Claim: "The Poison Sky" (which first broadcast on May 3, 2008) was directed by Douglas Mackinnon, produced by Susie Liggat and written by British screenwriter Helen Raynor.
Evidence: Douglas Mackinnon Susie Liggat Helen Raynor Helen Raynor (born March 1972) is a British television screenwriter and script editor, best known for her work on the relaunched BBC science fiction series Doctor Who. 3 May 2008 (2008-05-03)