Overview:Confidential is on location with the Doctor Who crew, presenting behind-the-scenes action from a beautiful 17th century estate in the Gloucestershire countryside and a high-rise housing estate in Bristol. Matt, Karen and Arthur give us a bit of a sing-song, we spend a long night with the one of the assistant directors and the special effects team show us that, sometimes, good old-fashioned green gloop is the only way. Mark Gatiss talks to us 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.