|Organisations worked for||Christine Johnson's Organisation|
|Appearances||Episode 3.5 (death, only appearance)|
- "This'll be difficult to explain to the next of kin: good news - he's not technically dead. Bad news - he's turned into a mushroom!"
- ―James Lester[src]
Mark Baker was an employee of Christine Johnson who travelled with her and Captain Wilder to the ARC. He was skulking around the ARC when he found the a sample of Future Fungus in Connor's lab. He touched it and was rapidly taken over and turned into a Fungus Creature. The team later killed the Baker creature by turning up the temperature in the room, causing the Baker creature to explode. (Episode 3.5)