The "Who" crew are filming today in Butetown, Rhymney and a few pictures have started to emerge. As you can see from the photo above, Matt seems to have another new costume - described as "check trousers and a bowler hat" by Ryan Farrell.
Courtesy of Ryan Farrell again, here's a picture of factory gates - giving away the episode title, maybe?
And another couple of Ryan Farrell photos - Jenna-Louise Coleman and Dame Diana Rigg:
Spotted on set so far are Matt Smith, Jenna-Louise Coleman and Dame Diana Rigg. There's also one other person - but as this could be quite a spoiler, I've put the name under the cut:
Once again, courtesy of the ever-reliable Ryan Farrell, it appears that Catrin Stewart - Jenny from "A Good Man Goes to War" - has also been spotted on set.