Speaking to Digital Spy, the actor said:
"I'm so busy at the moment that I don't know if I'd be able to,"
"But I'm very loyal to Doctor Who - I saw Steven Moffat recently and I think he's brilliant. He's one of those people that if he ever asked me to do anything, I'd do it."Darvill also revealed that he enjoyed the Doctor Who 2012 Christmas special, The Snowmen, which was the first episode to air following his character Rory's departure.
"Yes, I did see that - I thought it was great," he admitted. "The show's constantly growing - it's quite nice watching it and not knowing what's going to happen!"[Source]