The Poison Sky

Doctor Who | Season 4 | The Poison Sky

As the Sontarans choke the Earth, the Doctor and UNIT battle to keep both Martha and Donna alive.


The episode features both former companion Martha Jones and the alien Sontarans. It is the second of a two-part story, following “The Sontaran Stratagem”.

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Originally Aired: 05-03-2008
Director: Douglas Mackinnon
Writers: Helen Raynor
Starring: David Tennant
Catherine Tate
Freema Agyeman
Billie Piper
Bernard Cribbins
Jacqueline King
Ryan Sampson
Rupert Holliday-Evans
Christopher Ryan
Dan Starkey