The BBC have released an image of a new monster from Block 3 on filming of Doctor Who Series 9. (The image can be seen above) Block 3 consists of the episodes The Girl Who Died and The Woman Who Lived which are currently filming.
It's deliberately obscured in the half-light, but we can see its head shape and the bumps on it, we also see antennae and a red brain-shaped glowing light. It could be robotic or it could be some one wearing armour, and it appears to be housed in some kind of wooden shed...
Starring Maisie Williams (Game of Thrones) and David Schofield (Merlin), the episodes are written by Jamie Mathieson with Steven Moffat and Catherine Tregenna respectively. Both episodes are directed by Ed Bazalgette (Poldark).
Doctor Who will return for Series 9, with Peter Capaldi as the Twelfth Doctor, later in 2015.