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Doctor Who (2005–2022)Series 4, The Poison SkyThe Poison Sky
As the Sontarans choke the Earth, the Doctor battles to keep both Martha and Donna alive.
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Doctor Who (2005–2022)—Series 4, The Poison Sky
5/13As Sontarans choke the Earth, the Doctor and UNIT battle to keep Martha and Donna alive.
BBC One
