Series going behind the scenes of Doctor Who. Confidential is on location, presenting action from a 17th century estate in the Gloucestershire countryside and a high-rise housing estate in Bristol. The cast have a bit of a sing-song, there's a long night with the one of the assistant directors and the special effects team show how sometimes good old-fashioned green gloop is the only way. Mark Gatiss talks about writing for three consecutive TV Doctors and, in script to Screen, find out who plays an all-important historical figure. Featuring interviews with Matt Smith, Karen Gillan, Arthur Darvill, Mark Gatiss and Steven Moffat.