Actors David Bradley and Rupert Graves are to guest star in Series 7 of Doctor Who.

Veteran actor David Bradley is probably best known for his more recent role as school caretaker Argus Filch in the Harry Potter movies (yes, another one from Hogwarts!) He also appeared in an episode of Game of Thrones last year.

This isn’t actually Bradley’s first outing in the Whoniverse though; he was the voice of the vulture-like Shansheeth in The Sarah Jane Adventures story Death of the Doctor.

Rupert Graves meanwhile, will be recognisable to many readers as Detective Inspector Lestrade in Steven Moffat’s other show Sherlock.

The pair join Mark Williams, who was caught on set when filming began on Monday.