499apps

499apps · Case files

Interrogation.

A private mystery game for your own group. One person runs the night; everyone else reads, asks and answers, and together you try to solve one case.

Played with friends and families, on phones and laptops. Evidence arrives over time, detectives share a board, and at the end the truth comes out.

Watch the episodes How to play · 14 short videos

In development · no launch date yet · the screens in these videos are a development build

Family mode

A night that works with children at the table.

Each night is played in Adult realism, the default, or Family mode, chosen by the game master when the night opens. Family mode needs a paired child in the group, and the pages a child reads leave out weapons, the counsel clock and the gunpoint sentence.

  • A guardian creates the child’s profile. It stores a display name only.
  • The child’s device pairs with the guardian’s 8-character code. It works once and lasts 15 minutes.
  • No email is needed for the child.

Watch: Family mode and child devices

01 Featured · Case Files, Episodes 01 and 02

Two real cases, played start to finish.

Each episode is a whole Interrogation night on a real case from history: the game master sets up, the detectives get their drops, ask for a card, pin the board and accuse, and then you hear what really happened. Both episodes give away the solution, so play the case first if you would rather not know.

Episode 01

The Theft of the Mona Lisa, 1911

6:19 · Spoilers: reveals the solution

A whole Interrogation game night, start to finish, on a real case: the 1911 theft of the Mona Lisa from the Louvre. Watch the game master set up, the detectives get their drops, ask for a card, pin the board, accuse, and then hear what really happened.

Spoilers This episode shows the accusation and the debrief, which give away what really happened (from 4:43). The transcript below does too.

Audio only · MP3 · 6:19 · 4.5 MB

Real history, adapted for play. The phone and desktop screens are recordings of the real app (a development build), with the drop timers fired early for the video. The case cards, suspect cards and timeline are designed graphics. Both hosts are computer-generated voices. Captions are on; use the CC button to turn them off.

Transcript of Episode 1 (spoilers)
0:00 · Cold open: the empty wall

0:00Host B August, 1911. The Louvre is closed for cleaning. A painter walks in to copy the most famous face in the world.

0:09Host A The Mona Lisa.

0:10Host B The Mona Lisa. And on the wall, four iron pegs. That's it.

0:14Host A Wait. Just... pegs?

0:16Host B A guard figured the photographers had borrowed it.

0:19Host A Ha! A photo shoot. Sure.

0:21Host B The police promised to have it back in two or three days.

0:25Host A And how did that go?

0:26Host B Two years.

0:29Host A Okay, I'm in. But we're not just telling the story, are we?

0:32Host B Nope. Today we play it. A whole game night, start to finish.

0:36Host A And I've never played.

0:38Host B Perfect. You're a detective tonight.

0:41 · How an Interrogation night works

0:42Host B Quick version. Interrogation is a mystery game for your own group.

0:46Host B One person runs the night. Detectives read and ask. One player is secretly the perpetrator, and some are suspects. Everyone else watches.

0:56Host A And the case is real?

0:58Host B Real history, adapted for play. The facts are public. We just turn them into evidence cards.

1:04Host A Adapted for play. Got it.

1:06Host B And every screen in a phone frame today is the real app. No mockups.

1:11 · The 1911 case file

1:12Host B Here's the real case file. Monday the twenty-first of August, the Louvre is closed to visitors.

1:18Host B Tuesday morning, Louis Béroud finds the empty wall. The museum is searched room by room, and closed for a week.

1:27Host A And nobody got hurt?

1:28Host B Nobody. A heist with no villain waving a weapon. Perfect for game night.

1:34Host A Ha. Fine, so who did it?

1:35Host B That's the game.

1:37Host B Five names go on the suspect list. A poet, Guillaume Apollinaire. His friend, Pablo Picasso.

1:44Host A Picasso? The Picasso?

1:46Host B The very same. A judge questioned him in 1911.

1:51Host B Then Géry Pieret, a glazier named Vincenzo Peruggia, and a con man from a story that only appears in 1932.

2:01Host A Okay, I already suspect Picasso.

2:03Host B Everybody does. That's the fun.

2:05 · Setting up the night

2:06Host B Setup takes about five minutes. The game master makes a group, and sends one invite link.

2:12Host B Everyone joins with an email code. No password.

2:16Host A I hate passwords.

2:17Host B Same.

2:19Host B Then the GM opens a session, picks the case, and seats everybody.

2:24Host B Ada and Bea are detectives. Mara is the Glazier. Ned is the Stone-Head Seller. And Sid just watches.

2:32Host A Wait, I'm Ada!

2:33Host B You're Ada.

2:34Host A And what does the Glazier do?

2:36Host B Only Mara knows. Her card says so.

2:39Host A Ooh.

2:40Host B Everyone joins the lobby, the GM marks ready, and begins. The game clock starts.

2:47Host A That's the whole setup?

2:48Host B That's it. Now the evidence drops.

2:50 · The first drop

2:51Host B The first drop is manual. The GM releases it when the table is ready.

2:56Host A Okay. Here it comes.

2:58Host B Everyone gets the first card. Tuesday, the wall is empty.

3:02Host B But the detectives also get a diagram, and a note about the glass case. Sid sees only the public card.

3:09Host A Why does Sid see less?

3:11Host B Spectators watch the newsreel. Detectives get the file.

3:15 · Asking for a card

3:16Host B Detectives don't just wait. They ask. Ada wants the glass from the case tested.

3:21Host A It's pretty clean, I'm hoping.

3:23Host B The request lands on the GM's screen. The GM can release the card, or say no.

3:29Host A So the GM is in charge of pacing.

3:32Host B Exactly. Release.

3:34Host B And here's the card. One clear thumbprint on the glass. A left thumb.

3:38Host A Great, so we match it!

3:40Host B Not so fast. The police files were sorted by right-hand prints.

3:45Host A So a left thumb just... sits there.

3:47Host B Nobody could search it.

3:48Host A That is maddening.

3:50 · Pinning the board

3:51Host B Now Ada pins the cards to the board. Timeline, people, places, or unknowns.

3:57Host A I'll pin the empty wall to the timeline, and write, Monday was closing day.

4:01Host B Bea sees it right away. Shared board, live.

4:04Host A And Sid?

4:06Host B Sid sees nothing. The board belongs to the detectives.

4:09 · Drops on the clock, and red herrings

4:10Host B Some drops come on the game clock. A frame on the stairs at eight minutes. Reward notices at fifteen.

4:18Host A So the clock does the dripping.

4:19Host B Timers drip the story. Your questions unlock the rest. For the video, we fired those timers early.

4:28Host B Bea asked about the stone heads, and got Apollinaire before the judge.

4:32Host A Apollinaire! Was he in on it?

4:34Host B Arrested in September. And Picasso was brought in too. The judge let both go.

4:41Host A So they were red herrings.

4:42Host B Great ones.

4:43 · The accusation

4:44Host B Time to accuse. Ada picks Vincenzo Peruggia, and cites three facts.

4:49Host B The left thumb. The glazier on the curators' list. And the man in the white smock.

4:55Host A I'm nervous.

4:56Host B Good. Bea locks it. After that, nobody changes it. Then the GM ends the session.

5:02 · The debrief: what really happened

5:03Host B And now the debrief. Everyone sees the same page, spectators too.

5:08Host A Peruggia is one of the people who did it. I got it!

5:11Host B You did. And this is what Mara had all night.

5:15Host B Here's what really happened. Vincenzo Peruggia, an Italian who'd worked at the Louvre, took it on the Monday.

5:22Host A Why?

5:23Host B He said he wanted it back in Italy.

5:25Host B Two years later, he offered it to a Florence dealer. The Uffizi's director looked at it, and Peruggia was arrested on the twelfth of December, 1913.

5:36Host A And the Louvre got it back?

5:37Host B In January 1914. Peruggia got one year and fifteen days, and served about seven months.

5:46Host A So the real thief was the guy who put the glass on it.

5:49Host B Accounts of how he got out differ. But yes.

5:53Host A And the con man from 1932?

5:56Host B Never confirmed. We left him on the list as a rumor, to see if you'd bite.

6:00Host A Sneaky.

6:01 · What the night showed

6:02Host B That's one full night. Setup, drops, asks, the board, an accusation, and a debrief.

6:08Host A I want to be Mara next time.

6:10Host B Sources and image credits are in the description. Every image is public domain.

6:15Host A See you at the next case.

Episode 02

The Cottingley Fairies, 1917

8:57 · Spoilers: reveals the solution

Two cousins, a borrowed camera, and Sherlock Holmes’s creator. A full night: setup, drops, asks, board, accusation, debrief. Real history, adapted for play.

Spoilers This episode shows the accusation and the debrief, which give away what really happened (from 6:52). The transcript below does too.

Audio only · MP3 · 8:57 · 6.4 MB
Highlights · 1:07 · vertical cut for phones

A 1:07 portrait cut for phones and social feeds, with the words on screen. Download · MP4 · 4.8 MB

Real history, adapted for play. The phone and desktop screens are recordings of the real app (a development build), with the drop timers fired early for the video. The case cards, suspect cards and timeline are designed graphics, and the hatpin diagram is our own recreation. Both hosts are computer-generated voices. The 1917 photographs are public domain in the United States; see the licence note in Credits. Captions are on; use the CC button to turn them off.

Transcript of Episode 2 (spoilers)
0:00 · Cold open: two girls and a camera

0:00Host B July, 1917. Cottingley, a village in Yorkshire. Two cousins say they play with fairies at the stream at the bottom of the garden.

0:11Host A Fairies.

0:11Host B Elsie is sixteen. Frances is nine. Elsie borrows her father's camera, to prove it.

0:18Host A And?

0:19Host B Half an hour later, they come back. Triumphant.

0:22Host B The plate shows Frances behind a bush, with four little winged figures dancing in front of her.

0:28Host A Hold on. Real fairies?

0:30Host B Three years later, Sir Arthur Conan Doyle says yes.

0:34Host A The Sherlock Holmes guy?

0:36Host B The very same. And it takes sixty-six years for the cousins to say how they did it.

0:42Host A Okay, I'm in. But we're not just telling the story, are we?

0:46Host B Nope. Today we play it. A whole game night, start to finish.

0:50Host A And I've still never played.

0:51Host B Perfect. You're a detective tonight.

0:54 · How an Interrogation night works

0:55Host B Quick version. Interrogation is a mystery game for your own group.

1:00Host B One person runs the night. Detectives read and ask. One player is secretly the perpetrator, and some are suspects. Everyone else watches.

1:10Host A And the case is real?

1:12Host B Real history, adapted for play. The facts are public. We just turn them into evidence cards.

1:18Host A Adapted for play. Got it.

1:20Host B And every screen in a phone frame today is the real app. No mockups.

1:25 · The 1917 case file

1:26Host B Here's the case file. Summer, 1917. The village of Cottingley, near Bradford, in West Yorkshire.

1:33Host B Two photographs that year. Three more in August, 1920. That Christmas, Doyle puts them in The Strand magazine, and they sell out in days.

1:44Host A And nobody got hurt?

1:46Host B Nobody. No crime scene, no victim. Just one question. Who made the fairies, and how?

1:52Host A Well, surely it's the girls.

1:54Host B Hold that thought. In 1920, a lot of very clever people held the opposite one.

2:00Host A So who did it?

2:01Host B That's the game.

2:03Host B Five names go on the suspect list. The two cousins, Elsie Wright and Frances Griffiths.

2:09Host B Elsie's father, Arthur Wright, who developed the plates. Edward Gardner, a lecturer who championed the pictures.

2:16Host B And Sir Arthur Conan Doyle.

2:18Host A Doyle? The Doyle?

2:20Host B He wrote the article that made them famous.

2:22Host A Okay, I already suspect the man who really wanted fairies to be real.

2:26Host B Everybody does. That's the fun.

2:29 · Setting up the night

2:30Host B Setup takes about five minutes. The game master makes a group, and sends one invite link.

2:36Host B Everyone joins with an email code. No password.

2:39Host A I hate passwords.

2:41Host B Same.

2:42Host B Then the GM opens a session, picks the case, and seats everybody.

2:47Host B Ada and Bea are detectives. Mara is the Cousin. Ned is the Lecturer. And Sid just watches.

2:55Host A Wait, I'm Ada!

2:56Host B You're Ada.

2:57Host A And what does the Cousin do?

2:59Host B Only Mara knows. Her card says so.

3:02Host A Ooh.

3:03Host B Everyone joins the lobby, the GM marks ready, and begins. The game clock starts.

3:10Host A That's the whole setup?

3:11Host B That's it. Now the evidence drops.

3:13 · The first drop

3:14Host B The first drop is manual. The GM releases it when the table is ready.

3:19Host A Okay. Here it comes.

3:21Host B Everyone gets the first card. Summer, 1917. Two photographs.

3:26Host B But the detectives also get a diagram of the garden and the beck, and a note about the camera. Sid sees only the public card.

3:35Host A Why does Sid see less?

3:37Host B Spectators watch the newsreel. Detectives get the file.

3:41 · Asking for cards

3:42Host B Detectives don't just wait. They ask. Ada wants to see the original glass plates.

3:47Host A I'm hoping an expert says they're fakes.

3:50Host B The request lands on the GM's screen. The GM can release the card, or say no.

3:56Host A So the GM is in charge of pacing.

3:58Host B Exactly. Release.

4:01Host B And here's the card. A photography expert, Harold Snelling, looked at the negatives in 1920.

4:08Host B He found them genuine, unfaked, single exposures. No trace whatsoever of studio work.

4:15Host A So no trick!

4:16Host B Read it again. Studio work.

4:18Host A Oh. They weren't in a studio.

4:20Host B Nobody tested paper cutouts, outdoors.

4:23Host A That is a very careful sentence.

4:26Host B Bea asks about the camera, and gets Arthur Wright's statement.

4:30Host B He developed the plate himself. He took the figures for cardboard cutouts. He even searched the girls' bedroom and the beck.

4:38Host A And?

4:38Host B Found nothing. He called it a prank, and wouldn't lend them the camera again.

4:43Host A So he cleared them?

4:44Host B He found nothing. That's different.

4:47Host B Now Ada checks the girls' bedroom. And this card is adapted for play.

4:52Host A Adapted how?

4:53Host B In 1920, nobody looked at the bookshelf. In the game, you can.

4:58Host B Princess Mary's Gift Book. A Christmas book from the first winter of the war, with a drawing of dancing fairies by Claude Shepperson.

5:08Host A Those poses look familiar.

5:09Host B Put them side by side, and decide.

5:13Host B Last ask. Ada wants to know about Mr Gardner's visit.

5:17Host B July, 1920. He brings two cameras and twenty-four secretly marked glass plates to Cottingley.

5:25Host A That sounds like a real test.

5:27Host B The girls say the fairies won't show if anyone's watching. So Elsie's mother goes to her sister's for tea.

5:33Host A And the girls are left alone.

5:35Host B Alone. In August, they take three more photographs.

5:39Host A The marks prove the plates are his. They don't prove what was in front of the camera.

5:43Host B You're getting good at this.

5:44 · Pinning the board

5:45Host B Now Ada pins the cards to the board. Timeline, people, places, or unknowns.

5:51Host A I'll pin the two photographs to the timeline, and write, summer 1917, one season.

5:57Host B Bea sees it right away. Shared board, live.

6:00Host A And Sid?

6:01Host B Sid sees nothing. The board belongs to the detectives.

6:05 · Drops on the clock, and red herrings

6:06Host B Some drops come on the game clock. The first print at eight minutes. The lecture on fairy life at fifteen. Christmas, 1920, at twenty-five.

6:17Host A So the clock does the dripping.

6:19Host B Timers drip the story. Your questions unlock the rest. For the video, we fired those timers early.

6:27Host B Bea asked who could have posed as fairies, and got Sir Oliver Lodge.

6:31Host A A scientist?

6:33Host B A physicist. He thought the pictures were fake, and suggested dancers dressed up as fairies. He also doubted the very Parisian hairstyles.

6:42Host A Were there dancers?

6:44Host B No dancers were ever named.

6:46Host A So that's a red herring. What about Gardner and Doyle?

6:49Host B They believed. Believing is not evidence.

6:52 · The accusation

6:52Host B Time to accuse. Ada picks Elsie Wright, and cites four facts.

6:57Host B Elsie could draw, and had worked in a photographer's studio. The fairies look like drawings in Princess Mary's Gift Book.

7:05Host B The girls only took pictures when alone. And the expert ruled out studio tricks, not outdoor cutouts.

7:13Host A I'm nervous.

7:14Host B Good. Bea locks it. After that, nobody changes it. Then the GM ends the session.

7:20 · The debrief: what really happened

7:21Host B And now the debrief. Everyone sees the same page, spectators too.

7:26Host A Elsie is one of the people who did it. I got it!

7:29Host B You did. And this is what Mara had all night.

7:33Host B Here's what really happened. In 1983, the cousins admit it in a magazine, The Unexplained. The photographs were faked.

7:43Host A How?

7:44Host B Elsie copied Shepperson's dancing fairies from Princess Mary's Gift Book, and added wings. They cut the figures out of cardboard.

7:52Host B Then they held them up with hatpins, and threw the props in the beck.

7:56Host A Hatpins. That's wonderfully low tech.

7:59Host B And both maintained they really had seen fairies.

8:02Host A What about the fifth photograph?

8:03Host B Accounts differ. Elsie said it was faked. Frances said it was genuine.

8:08Host B Photography expert Geoffrey Crawley suggested an accidental double exposure of cutouts in the grass, so both could be sincere.

8:18Host A And poor Conan Doyle?

8:20Host B He published The Coming of the Fairies in 1922, and died in 1930. The cousins didn't admit anything until 1983, fifty-three years after he'd gone.

8:33Host A Oh. So he never knew.

8:34Host B No. The cameras are in a museum in Bradford now.

8:38 · What the night showed

8:38Host B That's one full night. Setup, drops, asks, the board, an accusation, and a debrief.

8:45Host A I want to be Mara next time.

8:47Host B Sources and image credits are in the description, along with the licence notes for the photographs.

8:53Host A See you at the next case.

02 How to play

Fourteen short chapters, one for every part of the night.

Each video runs under a minute, with two hosts walking through the real app. They are spoiler-free: no culprit and no private cards, and the debrief and the accusation are blurred on screen. Watch in order, or jump to the part you need. On a phone, portrait fills the screen; on a laptop, landscape does.

01–05 Getting started

What is Interrogation?

0:49

A 30-second tour of the idea: a private mystery for your own group, evidence that arrives over time, a shared board, and a reveal at the end.

Audio only · MP3 · 0.6 MB
Transcript

Host A Okay, so, what is Interrogation, exactly?

Host B It's a mystery game you play with your own group.

Host B One person runs the whole night.

Host B Everybody else has to read, ask, and answer.

Host A So it's a private table. Just us?

Host B Just you. One game master, a few friends, and one case to solve.

Host B And the clues don't show up all at once. They arrive over time.

Host A Like a drip?

Host B Exactly like a drip. You read every card closely.

Host B Then the detectives pin the good stuff to a shared board.

Host A Ooh. So it's a team thing.

Host B And at the end, the truth comes out, and everybody sees the reveal.

Host A Wait, no spoilers!

Host B Ha. Never. Promise.

Host B Next up, the four roles.

Host A Oh, I'm ready.

The four roles

0:50

Game Master, Detective, Perpetrator and Spectator: four seats, four different views. The cast list shows who is seated but never who is who, and everyone sees only what their seat allows.

Audio only · MP3 · 0.6 MB
Transcript

Host A Wait, so who actually plays?

Host B There are four seats, and each one sees something different.

Host B The game master runs the night, releases the evidence, and ends the case.

Host A So, the referee.

Host B Kind of. Detectives read, ask for cards, pin the board, and accuse.

Host A And the perpetrators?

Host B They know more than everybody else, and they keep it hidden.

Host A Ooh. Sneaky.

Host B And spectators just watch the public newsreel.

Host A Um, can I see who the perpetrator is? On the cast list?

Host B Nope. It only says, Seated. Nobody learns who's who.

Host A Ha! Good. Trust no one.

Host B Everyone sees only what their seat allows.

Host A That's the whole trick, isn't it?

Host B That's the whole trick.

Host B Next, how to sign in.

Host A Please say there's no password.

Sign in with an email code

0:45

No password: enter your email, tap Send code, check your inbox, type the six digits and tap Sign in. The first time, you choose the display name your group will see.

Audio only · MP3 · 0.5 MB
Transcript

Host A Do I need a password?

Host B Nope. Just your email.

Host B Start on the home page, and tap, Sign in with email.

Host A Easy.

Host B Type your email address, and tap, Send code.

Host A Okay. Sending.

Host A Ooh, an email just landed!

Host B That's your sign-in code. And here's the important bit.

Host B Ignore the link in the message. The code is the way in.

Host A Wait, not the link?

Host B Not the link. Type the code.

Host A Okay. Six digits, then, Sign in.

Host B That's it. You're in.

Host B The first time, you'll pick a display name. That's what your group sees.

Host A Can I be something dramatic?

Host B Ha. Go for it.

Host B Next, groups and invite links.

Host A Time to get my friends in.

Groups and invite links

0:52

Create a group, open the invite link or paste the invite code, pick a display name, tap Join, and the member list shows everyone at the table.

Audio only · MP3 · 0.6 MB
Transcript

Host A So how do I get my friends in?

Host B You make a group, and then you send an invite.

Host B Give your table a name, and tap, Create group.

Host A Mine's going to be, Sunday Night Table.

Host B That's your group page. Members, invites, and your nights all live here.

Host A Tidy.

Host B To invite someone, you make a link. You choose when it expires, and how many uses it gets.

Host A Oh, so it's not open forever.

Host B Right. By default, it's good for one use.

Host A And my friend just opens it?

Host B Yep. They open the link, pick a display name, and tap, Join.

Host B Or, if they're already signed in, they can paste the code from the end of the link.

Host A Two ways in. Nice.

Host B And then they're on the member list.

Host A Hello, table!

Host B Next, family mode.

Host A Ooh, I have questions.

Family mode and child devices

0:54

Adult realism is the default; Family mode is chosen per night and needs a paired child in the group. Guardians create a child profile (display name only) and pair the child's device with a single-use, 15-minute code, no email needed.

Audio only · MP3 · 0.7 MB
Transcript

Host A Is this okay for kids?

Host B Depends how you set it up.

Host B Adult realism is the default. Family mode is a choice.

Host A So you decide.

Host B You pick the mode for each night, right when you open the session.

Host A Adult realism, or Family. Got it.

Host B But Family mode needs a paired child in the group.

Host A Paired how?

Host B On the pages a child reads, the app leaves out weapons, the counsel clock, and the gunpoint sentence.

Host A So it's the same case, with a child at the table.

Host B A guardian adds a child. All it keeps is a display name.

Host A Mm. I like that.

Host B Then the child's device pairs with a code from the guardian. No email. It works once, for fifteen minutes.

Host A Better be quick!

Host B Next, setting up the night.

Host A Okay, game master hat on.

06–07 The Game Master

Game Master: set up the night

0:46

Open a night with the mode you want, review the draft, assign a seat to each player, check that everyone shows as Joined, mark ready and begin.

Audio only · MP3 · 0.6 MB
Transcript

Host A Okay, I'm the game master. Now what?

Host B Now you set up the night.

Host B Pick the mode, and open a session.

Host A Easy enough.

Host B It starts as a draft. Nothing's live yet.

Host A Good. I need a minute.

Host B Then you seat people. Pick the person, pick the role, and tap, Assign seat.

Host A Detective, detective, and one spectator.

Host B Once players join the session, the cast list shows them as Joined.

Host A So I can see who's here.

Host B The flow is, open the lobby. Mark ready. Begin.

Host A Three taps. I can do three taps.

Host B And then the night is running, and the clock starts.

Host A Oh no. The clock.

Host B Next, drops and the clock.

Host A Here we go.

Drops and the clock

0:47

The game master sees every drop in "Still to come", can pause or release the next drop by hand, and releases held cards one at a time while players and spectators watch new material land.

Audio only · MP3 · 0.6 MB
Transcript

Host A So how does the evidence show up?

Host B Slowly. On purpose.

Host B The game master sees a schedule called, Still to come. Every drop, in order, with when it's due.

Host A Ooh, a plan.

Host B You can pause the clock, or release the next drop yourself, whenever the room is ready.

Host A Like dealing cards.

Host B Pretty much.

Host B Detectives just see new cards appear on their desk.

Host A Ooh. A clue!

Host B And some cards are held back until someone asks for them. The game master releases those one at a time.

Host B Spectators get the public newsreel. Only the public stuff.

Host A Front row, no secrets.

Host B Next, reading the evidence like a detective.

Host A Magnifying glass, ready.

08–10 The detective’s desk

Detective: read the evidence

0:42

Read your private cards and every line of the evidence closely; times, places and what a card leaves out give a story away. Check the cast against what you read.

Audio only · MP3 · 0.5 MB
Transcript

Host A Okay, I'm a detective. What do I do?

Host B You read. A lot.

Host B First, your own desk. It says, Cards you can read, and each card shows who's allowed to see it.

Host B Then the evidence. Read every line. Times, places, small details.

Host A Everything counts, huh?

Host B Everything counts. Times and places are where a story slips.

Host B And remember, what a card leaves out can matter as much as what it says.

Host A Ooh. That's good.

Host B Check the cast list too, and match it against what the cards say.

Host A Who was where.

Host B Next, asking for a card.

Host A What if I need one I don't have?

Asking for a card

0:44

Pick what you need and tap Ask. The game master sees the request and can release the held card with one tap; your own requests stay listed on your desk.

Audio only · MP3 · 0.5 MB
Transcript

Host A What if I need a card I don't have?

Host B Ask for it.

Host B Say what you need, and tap, Ask. You can add a follow-up note, too.

Host A Please, sir, may I have a clue?

Host B Ha. Basically.

Host B The game master sees your request, and decides whether to release the card.

Host A Or say no?

Host B Or say no. Yeah.

Host B On their side, requests land in a list called, Requests.

Host B Held cards each get a Release button. One tap, and the card goes to the right team.

Host A Neat.

Host B And you can see your own requests, and where they stand.

Host A So I'm not left guessing.

Host B Next, the shared board.

Host A Ooh, pins.

The shared Board

0:41

Pin a card, sort what you know into Timeline, People, Places and Unknown, and write a working theory (who, how, why) that others can agree or disagree with. The game master can read it; spectators never see it.

Audio only · MP3 · 0.5 MB
Transcript

Host A Where do the clues go?

Host B On the board.

Host B Pick a card, pick a column, and tap, Pin. The detectives all see it.

Host B There are four columns. Timeline, People, Places, and Unknown.

Host A Unknown is my favorite.

Host B Ha. It's everyone's favorite.

Host B Then there's the working theory. Who, how, why, and the cards that back it up.

Host A And if my friend thinks I'm wrong?

Host B They can disagree, right there on the page.

Host B The game master can read the board too. Perpetrators and spectators never see it.

Host A So no peeking.

Host B Next, the perpetrator view.

Host A Oh, the fun seat.

11–12 The other seats

The Perpetrator view

0:37

A private briefing only perpetrators can read (blurred in the video), the same public evidence as everyone else, no board, no accusation, and the debrief at the end.

Audio only · MP3 · 0.4 MB
Transcript

Host A Okay, and if I'm the bad guy?

Host B Ooh. Fun seat.

Host B You get a private briefing that only perpetrators can read. I'm not saying a word about what's in it.

Host A Ha! No spoilers.

Host B You still see the public evidence, same as everyone.

Host B But you don't get the board, and you can't make the accusation.

Host A So I just act natural.

Host B Act natural.

Host B And at the end, you see the debrief, just like everybody else.

Host A Even me?

Host B Even you.

Host B Next, the spectator view.

Host A Popcorn time.

The Spectator view

0:30

"Nothing private is on your desk." Spectators follow the public newsreel only: no board, no accusation, and no debrief until the night ends.

Audio only · MP3 · 0.4 MB
Transcript

Host A What if I just want to watch?

Host B Then you're a spectator.

Host B Your desk says, Nothing private is on your desk.

Host A Ha. So I'm empty-handed.

Host B But you do get the public newsreel.

Host A Oh, that's something.

Host B No board, and no accusation. And you see the ending when the night ends.

Host A Popcorn seat.

Host B Then you see the reveal with everyone else.

Host A Best seat in the house.

Host B Next, the accusation.

Host A Oh no. I'm nervous.

13–14 The ending

The Accusation

0:35

Choose a suspect, tick the facts the team has and save the draft; everyone sees the same draft and one detective locks it. Only detectives see this page. The name is blurred in the video.

Audio only · MP3 · 0.4 MB
Transcript

Host A So how do you actually accuse someone?

Host B Together.

Host B Pick a suspect, tick the facts your team has, and tap, Save draft.

Host A Facts? Like evidence?

Host B The facts you can back up.

Host B Every detective sees the same draft. And when you're sure, one detective locks it.

Host B Once it's locked, the page says so. The accusation is locked.

Host A Dramatic.

Host B And only detectives see this page.

Host A Teamwork.

Host B Last one. Ending the night.

Host A Is it already over?

Ending the night

0:39

The game master ends the session; everyone sees the debrief (blurred in the video to avoid spoilers) with how many key facts matched, then the story behind the case. The board closes. Talk it through, then play another night.

Audio only · MP3 · 0.5 MB
Transcript

Host A And then it ends?

Host B The game master ends the session.

Host B One tap. End session.

Host B Then everyone gets the debrief. It says who did it, and how many key facts matched.

Host A And who did it?

Host B Ha. Not from me. Play a night.

Host B Then there's the story behind the case, and what each team received along the way.

Host A Oh, I want to see that.

Host B After that, the board is closed.

Host A Case closed.

Host A And then we talk about it all night.

Host B Of course. Then you deal another one.

Host B That's the whole night.

Host A Case closed. Deal the next one.

03 Listen

Prefer to listen? Every video is also audio.

The whole how-to-play series as one 10:22 podcast-style episode, or one MP3 per chapter. Good for the car or the kitchen.

04 Credits

Sources and credits

Historic images are from Wikimedia Commons or English Wikipedia and carry the licence tag shown there on the day of research (25 October 2026 for Episode 1, 26 October 2026 for Episode 2). The linked file page is the authority. No image under an attribution-required licence is used.

Episode 01 The Theft of the Mona Lisa, 1911

Every historic image in Episode 1 is tagged public domain on Wikimedia Commons (photographs and press pages from 1911 to 1914, and Leonardo’s painting).

Historic images · Episode 1
ImageAuthorDateLicenceSource
Mona Lisa stolen-1911.jpgUnknown author1911-08Public domainWikimedia Commons
Excelsior - Vincenzo Peruggia - Vol de La Joconde - Mona Lisa.jpgLafitte, Pierre (1872-1938). Directeur de publication1913-12-14Public domainWikimedia Commons
Mona Lisa Found, La Joconde est Retrouvée, Le Petit Parisien, Numéro 13559, 13 December 1913.jpgLe Petit Parisien13 December 1913Public domainWikimedia Commons
Excelsior, journal illustré quotidien, La Joconde est Revenue, 1 January 1914.jpgUnknown author1914-01-01Public domainWikimedia Commons
Guillaume Apollinaire et le juge d'instruction Me. Drioux lors de l'affaire du vol de la Joconde, en septembre 1911.jpgUnknown photographerseptembre 1911Public domainWikimedia Commons
Guillaume Apollinaire - Septembre 1911.jpgUnknown photographerSeptembre 1911Public domainWikimedia Commons
Monalisa uffizi 1913.jpgUnknown authorDecember 1913Public domainWikimedia Commons
After photo for the return of Gioconda at the Louvre Museum 1914.jpgRoger-Violett1914-01-04Public domainWikimedia Commons
Louis Beroud - La Copiste devant la Joconde.jpgLouis Béroud1909Public domainWikimedia Commons
Vincenzo peruggia.jpgUnknown author1909Public domainWikimedia Commons
Pablo Picasso in his Montmartre studio, 1908.jpgGelett Burgess1908Public domainWikimedia Commons
Pablo Picasso, summer 1912.jpgAnonymousSummer 1912Public domainWikimedia Commons
Leonardo da Vinci - Mona Lisa (Louvre, Paris).jpgLeonardo da Vincibetween 1503 and 1516Public domainWikimedia Commons
Salon carré du Louvre 1875.jpgLucien Przepiórski1875Public domainWikimedia Commons
La Gioconda a Firenze.jpgL'Illustrazione Italiana1913-12-21Public domainWikimedia Commons
Two men carry the Mona Lisa back to the Louvre in January 1914.jpgAnonymous1914Public domainWikimedia Commons
Mona Lisa is recovered.jpgAnonymousbetween circa 1913 and circa 1914Public domainWikimedia Commons

Facts and background

Where accounts differ, for example the later story of the con man Valfierno, the video says so. The game parts are labelled “adapted for play”.

Screen footage

Phone and desktop footage are real captures of the Interrogation app (a development build). Dev data and dates appear on the cards. Drop timers were fired early for the video. The suspect portraits for Pieret, Valfierno and Peruggia are typographic monograms, not photographs.

Original work and software

Motion graphics, role cards, the case file card and the drop timeline are original. The music bed and sound effects are original, synthesised for the videos. Voices: Kokoro-82M text-to-speech (Apache-2.0). Typefaces: Newsreader, IBM Plex Sans and IBM Plex Mono (SIL Open Font License).

Episode 02 The Cottingley Fairies, 1917

Licence note

  • Photographs 1 and 2 (1917) are hosted on English Wikipedia only, where they are tagged public domain in the United States (PD-US). They are not on Wikimedia Commons, which suggests a more cautious view elsewhere: in the UK the first photograph is generally treated as protected until 2059. They appear in the video on the basis of US public-domain status. Photographs 3 to 5 (1920) are tagged public domain on Commons.
  • The two Princess Mary’s Gift Book montages (Shepperson’s 1914 illustrations beside the 1917 photographs) are by Wikipedia user gobeirne and tagged PD-US.
  • The portrait of Arthur and Jean Conan Doyle (c. 1920) comes from the National Media Museum via Commons, marked “No known copyright restrictions”.
  • Photographs of the real Cottingley cameras are not used. The camera scenes are our own graphics.
Historic images · Episode 2
ImageAuthorDateLicenceSource
Cottingley fairies 1.webpElsie Wright (Life time: 1901-1988)1917Public domainEnglish Wikipedia
CottingleyFairies2.jpgFrances Griffiths (died 1986)Taken in 1917, firstPD-USEnglish Wikipedia
Cottingley Fairies 3.jpgElsie Wright1920-08-26Public domainWikimedia Commons
Cottingley Fairies 4.jpgFrances Griffiths1920-08Public domainWikimedia Commons
Cottingley Fairies 5.jpgFrances Griffiths and Elsie Wright1920-08Public domainWikimedia Commons
Cottingley fairies illustration.jpgClaude A. Shepperson (1867–1921)1914Public domainWikimedia Commons
CottingleyFairies-PrincessMary gobeirne.pngvarious1917 and 1914PD-USEnglish Wikipedia
CottingleyFairies-PrincessMary2 gobeirne.pngvarious. Montage by User:gobeirne1917 and 1914PD-USEnglish Wikipedia
Elsie1920.jpgUnknown author1920Public domainWikimedia Commons
Frances1920.jpgUnknown author1920Public domainWikimedia Commons
EdwardLGardner.jpgunknown (no precision in the book)1922Public domainWikimedia Commons
Arthur Conan Doyle by Walter Benington, 1914.pngWalter Benington1914Public domainWikimedia Commons
Sir Arthur and Lady Jean Conan Doyle, c.1920. (7893553748).jpgNational Media Museum from UK2012-08-30 13:14No restrictionsWikimedia Commons
Oliver Joseph Lodge cph.3a03822.jpgPirie MacDonald1922Public domainWikimedia Commons
Kodak ad, 1915.jpgEastman Kodak Company11 December 1915Public domainWikimedia Commons

Facts and background

  • Wikipedia: Cottingley Fairies
  • Science Museum Group collection (the cameras, objects co469870 and co469836)
  • BBC News and BBC Bradford, on the cameras and the 1983 confession
  • Skeptoid #805, and the James Randi Educational Foundation essay
  • Arthur Conan Doyle, The Strand Magazine, December 1920, and The Coming of the Fairies (1922)
  • University of Leeds Special Collections; British Journal of Photography, Geoffrey Crawley series (1982–83)

Where accounts differ, the video says so: who handed over the cameras in 1920 (Gardner, Doyle or both), the fifth photograph, and how the cousins saw it (a joke, a game or something more). The case file, suspects, evidence cards and drop schedule are “adapted for play”: they paraphrase the record and are not period documents. The hatpin diagram is our own recreation, labelled on screen.

Screen footage

Phone and desktop footage are real captures of the Interrogation app (a development build, adult mode; family mode needs a paired child). Dev data and dates appear on the cards. Drop timers were fired early for the video, and the narration says so.

Original work and software

Motion graphics, role cards, the case file card, the drop timeline and the hatpin recreation are original. The music bed and sound effects are original, synthesised for the episode. Voices: Kokoro-82M text-to-speech (Apache-2.0). Typefaces: Newsreader, IBM Plex Sans and IBM Plex Mono (SIL Open Font License).