The Poison Sky (2)

Name: The Poison Sky (2)
Director: Douglas Mackinnon
Released: 2008-05-03
Duration: 47 min
Rating: 7.3
Cast: Billie Piper, Freema Agyeman, Christopher Ryan, Ryan Sampson, Christian Cooke

S4 E5 May 3, 2008 0h 47m ★ 7.3

Source:

Overview

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?