The Poison Sky (2)
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?

Cast
Jodie WhittakerThe Doctor
Mandip GillYasmin 'Yaz' Khan
John BishopDan LewisDoctor Who on tvt

