Storyline
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.
Top 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
?
Lily Bevan
Emily
Max Bollinger
Mikhail
Charles De'Ath
Adelaide's Father
?
Rachel Fewell
Young Adelaide
?
Anouska Strahnz
Ulrika Ehrlich
?
Zofia Strahnz
Lisette Ehrlich
Paul Kasey
Ood Sigma
Director
Graeme Harper
Writers
Russell T Davies, Phil Ford
Status
Released
