The Poison Sky (2) S5E5 - The Poison Sky (2) 2008
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?
- Released: 2008-05-03
- Runtime: 50 minutes
- Genre:
- Stars: David Tennant, Catherine Tate
- Director: Douglas Mackinnon