A sourced illustration has not yet been added. This gap is included in the coverage record.
Overview
The Flood is a sentient infection encountered in the Martian colony's water system. Infected humans develop cracked mouths and emit water that can transmit the condition, turning contact and the base's essential supply into routes of attack. A coordinating mind makes the converted crew dangerous beyond the individual hosts' bodies, while the Doctor interprets the organism as something once trapped by the Ice Warriors.
That imprisonment history is a deduction inside the episode, not a complete observed biography of the pathogen. The outbreak also places the Doctor against his knowledge of the colony's historical fate, making attempted rescue part of a conflict about the limits of intervention. This Flood belongs to Doctor Who; the shared name does not connect its biology or hive mind to Halo's separately developed parasitic life form.
First appearances & development
The Waters of Mars (2009) introduces the Flood at Bowie Base One. The selected 2009 television treatment is the narrative baseline. The second bibliography item is an official reference account, not an invented second narrative appearance. Licensed audio and prose can develop their own emphases, which are not silently merged into these scenes.
Canon & continuity
BBC Studios' linked creature or episode material supports the depicted waterborne transformation and collective control. The bibliography identifies the actual writer and selected production. Claims made by characters and inferred histories are kept separate from events directly depicted; one official guide does not establish all versions of the organism.
Selected bibliography
Documented works and useful reading. This is not a list of every appearance.
- 01
The Waters of Mars
The Flood infection aboard Bowie Base One and the Doctor's attempted intervention in established history.
- 02
The Flood — Explore the Whoniverse
Official creature profile supporting the selected television appearance; a current undated reference treatment, not a second story.
Family & connections
A source-supported family tree or inspiration record has not yet been compiled for this profile. Related reading below indicates a connection in subject matter, not a proven lineage or creative influence.
References
Sources supporting this profile. Linked pages have their own scope and editorial standards.
- OfficialThe Flood (Doctor Who) — official franchise guideResearch access: 2026-10-05
Image credits
A sourced illustration has not yet been added. This gap is included in the coverage record.
