“The scripts I read bore very little relation to the ones that were finally produced, they changed all the significant details so I couldn’t spill the beans if I didn’t get it,” he said.
Eagle-eyed viewers might recognise Darvill from the 2009 BBC version of Little Dorrit.
“Yes, I was doing all this period drama stuff last time I was on TV. I suppose you can’t get much further away from that than Doctor Who,” he said.
While this might be 28-year-old Darvill’s first close encounter with sci-fi, it isn’t the first time that he and the new Doctor, Matt Smith, have worked together.
“Matt and I were in a play called Swimming With Sharks with Helen Baxendale and we really enjoyed working together and said that we should definitely do it again if we ever got the chance,” he said.
“Little did we know that it was going to be on this!”
Despite Doctor Who being one of the BBC’s flagship productions and the biggest TV success of the last few years, Darvill, who is originally from Birmingham, says he didn’t feel any extra pressure being on set.