header005 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 NOTE TO EDITORS: Not for use more than 21 days after issue. You may use this picture without charge only for the purpose of publicising or reporting on current BBC programming, personnel or other BBC output or activity within 21 days of issue. Any use after that time MUST be cleared through BBC Picture Publicity. Please credit the image to the BBC and any named photographer or independent programme maker, as described in the caption.