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The Poison Sky (Series 4 Episode 5)
Last updated 02 January 2017
7:30pm-8:30pm AEST (09:30 GMT) < > « »
SyFy (Australia) (adverts during broadcast)
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Featuring: David Tennant, Freema Agyeman, Bernard Cribbins, Catherine Tate, Jacqueline King, Christopher Ryan, Ryan Sampson
The Sontarans activate their masterplan and begin to choke the whole of planet Earth. UNIT is left defenceless, with a traitor in their ranks.
Synopsis Source: Syfy Site Listing
Broadcast Source: SyFy