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S4-E5 The Poison Sky

S4-E5 The Poison Sky

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Part two of two. The Sontarans activate their masterplan and begin to choke Earth, while Unit is left defenceless, with a traitor in its ranks. As interplanetary war edges closer, the Doctor considers making the ultimate sacrifice to keep Martha and Donna alive. Freema Agyeman and Christopher Ryan guest star.

Cast & Crew

The Doctor David Tennant
Donna Noble Catherine Tate
Martha Jones Freema Agyeman
Wilfred Mott Bernard Cribbins
Sylvia Noble Jacqueline King
Luke Rattigan Ryan Sampson
Colonel Mace Rupert Holliday-Evans
General Staal Christopher Ryan
Commander Skorr Dan Starkey
Private Harris Clive Standen
Private Gray Wesley Theobald
Ross Jenkins Christian Cooke
Captain Price Bridget Hodson
Herself Kirsty Wark
US newsreader Lachele Carl
Male student Leeshon Alexander
Female student Meryl Fernandes
Director Douglas Mackinnon
Producer Susie Liggat
Writer Helen Raynor
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