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.
Directed by Graeme Harper
alternate history
epidemic
carrot
altruism
tv special
Rank
#7 in 2009·#405 overall
Trailer
IMDB
N/A
Letterboxd
4.1 / 5
Cast
David Tennant
The Doctor
Lindsay Duncan
Captain Adelaide Brooke
Peter O'Brien
Ed Gold
Sharon Duncan-Brewster
Maggie Cain
Gemma Chan
Mia Bennett
Aleksandar Mikic
Yuri Kerenski
Michael Goldsmith
Roman Groom
Cosima Shaw
Steffi Ehrlich
Joplin Sibtain
Tarak Ital
Alan Ruscoe
Andy Stone
Max Bollinger
Mikhail
Charles De'Ath
Adelaide's Father
Crew
Graeme Harper
Director
Russell T Davies
Writer
Murray Gold
Original Music Composer
Russell T Davies
Executive Producer
Julie Gardner
Executive Producer
Nikki Wilson
Producer
Popular Reviews
185 reviews
Beth Anne
8.0★ · 03/22/26
Why does his space suit look like that 😳
Why does his space suit look like that 😳
lu
10.0★ · 03/05/26
I agree with everything that man says. Time Lord Victorious? Yes you are!! Should everyone obey you? Yes!!! Don’t kill him, he’s just a 900 year old baby trying to be happy😭
I agree with everything that man says. Time Lord Victorious? Yes you are!! Should everyone obey you? Yes!!! Don’t kill him, he’s just a 900 year old baby trying to be happy😭
dan
10.0★ · 02/19/26
the doctor saying good boy two specials in a row? my my 😍 /hj
also these water things r fucking TERRIFYING
the doctor saying good boy two specials in a row? my my 😍 /hj
noo where is my silly little show, i’m genuinely scared of the doctor in this one. but at the same time i think this was one of the best episodes so far
noo where is my silly little show, i’m genuinely scared of the doctor in this one. but at the same time i think this was one of the best episodes so far
