Doctor Who (2005– )
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The Waters of Mars 

In a Mars base the inhabitants are being infected by a mysterious water creature which takes over its victims. The Doctor is thrust into the middle of this catastrophe knowing a larger one is waiting around the corner.


Graeme Harper

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Episode cast overview, first billed only:
David Tennant ... The Doctor
Lindsay Duncan ... Adelaide Brooke
Peter O'Brien ... Ed Gold
Aleksandar Mikic Aleksandar Mikic ... Yuri Kerenski
Gemma Chan ... Mia Bennett
Sharon Duncan-Brewster ... Maggie Cain (as Sharon Duncan Brewster)
Joplin Sibtain ... Tarak Ital (as Chook Sibtain)
Alan Ruscoe ... Andy Stone
Cosima Shaw ... Steffi Ehrlich
Michael Goldsmith ... Roman Groom
Lily Bevan Lily Bevan ... Emily
Max Bollinger ... Mikhail
Charles De'Ath ... Adelaide's father (as Charlie De'Ath)
Rachel Fewell Rachel Fewell ... Young Adelaide
Anouska Strahnz Anouska Strahnz ... Ulrika Ehrlich


The Doctor arrives on Mars in the year 2059 and joins the first human Earth colony led by Adelaide Brooke. The day he arrives is also the day history records the entire settlement destroyed in an unknown cataclysm with all members of the settlement being killed. Everyone soon realizes that colonists are being infected by some unknown agent and are being transformed into zombie-like creatures. For reasons that are eventually explained, The Doctor is not prepared to save them and tells Brooke that she has to die. He quite torn by this decision and eventually chooses another path, one that will have other repercussions for him in the future. Written by garykmcd

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TV-PG | See all certifications »

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Russian | English

Release Date:

19 December 2009 (USA) See more »

Company Credits

Production Co:

BBC Wales See more »
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Technical Specs


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Did You Know?


Margaret Cain was born on December 28, 2028. See more »


Almost every obituary repeats its opening paragraph as the first lines of its last visible paragraph. See more »


Gadget: Gadget-gadget!
The Doctor: I hate robots. Did I say?
Roman Groom: Yeah, and he's not too fond of you. What's wrong with robots?
The Doctor: It's not the robots, it's the people. Dressing them up and giving them silly voices. You're reducing them.
Roman Groom: Yeah. Friend of mine, she made her domestic robot look like a dog.
The Doctor: Ah, well, dogs. That's different.
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Featured in Doctor Who Confidential: Is There Life on Mars? (2009) See more »


Doctor Who Closing Credits
Written by Ron Grainer
Performed by BBC National Orchestra of Wales
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User Reviews

About the earlier comment of continuity.....
17 November 2009 | by ktd-1See all my reviews

invisibleskidmark, you obviously did not watch the "Stolen Earth" or "Journey's End" closely because the Daleks in the Medusa Cascade were NOT part of the Time War.

At the end of the "Evolution of the Daleks" (series 3) the last of the Cult of Skaro (Dalek Caan) did an emergency temporal shift which SENT HIM BACK INTO THE TIME WAR where he consequently rescued Davros, creator of the Daleks, and lost his mind (went mad) in the ensuing ability to see all of time and space. The Time War was timelocked and Caan somehow broke through it. The incident at the Medusa Cascade happened and lost planets returned to their appropriate places and times. It became a FIXED point in time/space.

There was no continuity problem regarding the Medusa Cascade incident as we saw that the whole of Earth was celebrating the return of Earth to the Solar system in "Journey's End" I suggest before commenting on continuity that you remove the finger off the fast forward button....

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