The series is reported to involve Matt Smith, as well as David Walliams, Miranda Hart, the cast of Call The Midwife, Lee Mack, Strictly Come Dancing’s Craig Revel Horwood, the cast of EastEnders and Pudsey the dancing dog.
Episode One - broadcast tonight on BBC One just before Eastenders and not on the 8th December as originally expected - does not feature Smith himself, but Doctor Who is represented instead in the form of the TARDIS being mistaken for a dressing room by Mrs Brown (Brendan O'Carroll from the BAFTA-winning sitcom Mrs Brown's Boys).
It's Showtime!
It's Showtime! Episode One (YouTube / BBC iPlayer)
It's Showtime! Teaser Trailer (YouTube / BBC iPlayer)
It's Showtime! Showcase Trailer (YouTube / BBC iPlayer)
It's Showtime! Teaser Trailer (YouTube / BBC iPlayer)
It's Showtime! Showcase Trailer (YouTube / BBC iPlayer)