Doctor Who: The Poison Sky (2) (Season 4 Episode 5)

The Sontarans continue their evil plot and begin to "choke" the Earth. The Doctor and Donna, now teamed with Martha have to stop them! Can they save Earth before it's too late?

GUEST CAST
Christopher Ryan General Staal
Ryan Sampson Luke Rattigan
Christian Cooke Ross Jenkins
Dan Starkey Commander Skorr
Lachele Carl
Billie Piper Rose Tyler

CREW
Writer Helen Raynor
Director Douglas Mackinnon

Series: Doctor Who Season 4 Episode 5
Original Airdate: 2008-05-03

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