The Doctor is what Playtime Co. made out of Dr. Harley Sawyer. He is Experiment 1354, a brain in a tank that runs the prison through cameras, robot bodies and an Omni-Hand, and the main threat of Chapter 4. The Player pulls his Omni-Chip to shut him down, and a backup of him wakes at the end of Chapter 5.
Experiment 1354
Harley Sawyer was the scientist behind the Bigger Bodies Initiative, and then it was done to him. On the tape 'The Doctor', Leith Pierre, Stella Greyber and Eddie Ritterman agree that he can no longer lead the project after several incidents, the worst being the Theater Incident. Pierre says they cannot kill him, because they need him.
On 'Experiment #1354' Sawyer wakes up after the procedure with Dr. White present. Pierre tells him he will now answer to the lab staff and carry out procedures as ordered. Sawyer threatens to kill him.
What is left of him is a brain in a large tank, in the middle of a room of screens. His lungs and his liver are kept in containers elsewhere in his territory. He acts through robot bodies that have a monitor for a head, and for most of Chapter 4 he is only a voice and an eye on a screen.
I gave them purpose! I made their lives matter!
The Warden's hand
During the Hour of Joy the prison Warden ran to the Doctor. On the tape 'Warden Office 8/8/1995' the Doctor talks him into handing over the Omni-Hand, and promises him a path to the exit. That hand is how he controls the prison. On the same tape he credits Experiment 1006 with the uprising.
The Prototype does not return the favor. On the tape 'Time' he tells the Doctor that his suggestions have not produced results, refuses to give him access to the Labs, and reminds him that being useful is the only reason he was kept alive.
Safe Haven
He meets the Player on the train monitor, says he will make a game of them, and crashes the train into the Shelf East Block. Then he tests them. He releases Nightmare Critters and Mini Huggies, floods the Northwest Block with Red Smoke, and lets Yarnaby out in the Containment Zone.
After Yarnaby dies he talks instead. The Player is what the Prototype fears, he says. He asks why they came back, since a letter that vague cannot be the only reason. He claims that Poppy knew the Hour of Joy was coming and has told the Player only what suited her.
The Player takes him apart one organ at a time, freezing his lungs in Cold Storage and destroying his liver in the Secondary Lab. He disables the Player's Purple Hand, sets a large Baba Chops on them, and then demands that they kill a trapped Simon Smoke toy to open a door.
In his headquarters a robot body throws the Player through a trapdoor into a dark server maze full of his bodies. The Player powers the terminals with batteries, climbs back up and pulls out his Omni-Chip. His bodies reach for the Player and shut down as the tank implodes. His last words are that the Player has saved no one.
There are no places you can hide. Not from me.
I'll bury myself so far down that no one will ever find me. Not you. Not The Prototype. Not anyone.
The backup
A digital copy of his mind was stored in the Data Center. Giblet says the backup there holds the negation formula, and that it can be used against the Prototype.
At the end of Chapter 5 Giblet leads the injured Player to it. The Player pulls the override levers and restarts an old terminal. The backup is Harley Sawyer. His eye appears on a monitor, he speaks, and the chapter ends.
Well now, this is a rather interesting turn of events...
Sources
In the games
- Chapter 3: Deep Sleep
- Chapter 4: Safe Haven
- Chapter 5: Broken Things
- Log 24459 Tape, Chapter 3
- Warden Office 8/8/1995 Tape, Chapter 4
- The Doctor Tape, Chapter 4
- Experiment #1354 Tape, Chapter 4
- Time Tape, Chapter 4
- Young Geniuses Program Removal Letter Note, Chapter 4
Checked against 20 pages
- Mob Entertainment: character page
- Poppy Playtime Wiki (Fandom): Chapter 4: Safe Haven
- Poppy Playtime Wiki (Fandom): Chapter 4: Safe Haven, Credits
- Poppy Playtime Wiki (Fandom): Chapter 4: Safe Haven, Transcript
- Poppy Playtime Wiki (Fandom): Experiment 1354 (VHS tape)
- Poppy Playtime Wiki (Fandom): Harley Sawyer
- Poppy Playtime Wiki (Fandom): The Doctor (VHS tape)
- Poppy Playtime Wiki (Fandom): Time
- Poppy Playtime Wiki (Fandom): Warden Office 8/8/1995
- Poppy Playtime Wiki (Fandom): Young Geniuses Program Removal Letter
- Poppy Playtime Wiki (wiki.gg): Chapter 4: Safe Haven
- Poppy Playtime Wiki (wiki.gg): Harley Sawyer
- Poppy Playtime Wiki (wiki.gg): The Doctor
- Villains Wiki (Fandom): Harley Sawyer
- Wikipedia: Poppy Playtime
- Destructoid
- Gamereactor
- Hold to Reset
- Insider Gaming
- The Escapist


EXP. 1170
EXP. 1172
Chapter 1
EXP. 1006
Chapter 2
Chapter 2