Darvill, who plays Amy's fiancé Rory, explained that he is pleased with the storylines he has been given.
Speaking to TV Choice, the actor added that he is happy his character has travelled in the Tardis.
"I feel privileged every day," he said. "I think Steven Moffat has written such a brilliant storyline for Rory. I was really excited every time you opened the script, because you never know what's going to happen."
Darvill continued: "I do think it works really well. It's so different to what's come before. I wish I could tell you what happens, but I really can't!"
Doctor Who continues on Saturday at 7pm on BBC One.