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

Name: The Poison Sky (2)
Released: 2008-05-03

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?

Aired 2008-05-03 · 47 min

Doctor Who: all seasons and episodes

S4 E4: The Sontaran Stratagem (1)
S4 E6: The Doctor's Daughter