Undated BBC handout photo of actor David Bradley who will play, William Hartnell, the first ever Doctor, in a new drama about the birth of the long-running science-fiction show called An Adventure In Space And Time. PRESS ASSOCIATION Photo. Issue date: Thursday July 11, 2013. Bradley, who played Hogwarts caretaker Argus Filch in the Harry Potter films, is joined in the cast by Call The Midwife star Jessica Raine, who plays pioneering producer Verity Lambert, and Brian Cox, who plays another BBC executive. The 90-minute BBC Two drama is part of the 50th anniversary celebrations of the show which first aired on November 23 1963. See PA story SHOWBIZ DoctorWho Bradley. Photo credit should read: Hal Shinnie/BBC Worldwide/BBC/PA Wire

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