STORY
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.
CAST & CREW
- David Tennant
- Lindsay Duncan
- Peter O'Brien
- Sharon Duncan-Brewster
- Gemma Chan
Cast
- Graeme Harper
Director
INFORMATION
- BBC Cymru Wales
Production Companies
- United Kingdom
Production Countries
LANGUAGES
- English
