Doctor Who: Daleks return 2012 - Pictures

Production on this year's series of Doctor Who continued today, with the Daleks being present on set.

Five obscure pictures of the monsters were unveiled on the official Doctor Who website, along with a post which said: "The Daleks are being wheeled before the cameras once again. But which design? The answer is all of them!"

Part of the episode was filmed in Spain and a Dalek appeared in the first preview of the series which was made available earlier this week.