Arthur Darvill wanted to leave Doctor Who
Arthur Darvill (Rory Williams) says he feels the time is right to leave the BBC One sci-fi drama because the show needs to move on.
Arthur Darvill didn't' want to "outstay [his] welcome" on 'Doctor Who'.
The 30-year-old actor - who is leaving the sci-fi drama along with Karen Gillan (Amy Pond) in upcoming episode 'The Angels Take Manhattan' - felt it was the right time to leave the BBC One show because he doesn't want to stop it from evolving.
Arthur told Blastr: "Me and Karen made a decision to leave when we did, but we're definitely going to miss it. It does feel like the right time to move on.
"The worst thing you can do is outstay your welcome on something like this. We've had such a good run and such good stories, but the whole programme is about change.
"It's about things changing and evolving. So it's sad to leave, but it feels like the right thing to do."
Arthur has played flame-haired sidekick Karen's love interest, Rory Williams, since 2010 and never expected his supporting role to become a major character, but he didn't get bored because of the rich variety of the storylines.
He added: "As an actor, I wanted to do different things, and, for me anyway, I'm quite an impatient person.
"I want variety... so signing onto something for so long was a risky thing to do. It's so easy to get bored.
"But with the scripts that were thrown at us there wasn't a chance of that ever happening, because it wasn't just turning up to work to do the same thing every day.
"It was something new every single day. Something new to explore about the character."
The new series of 'Doctor Who' continues this Saturday (08.09.12) on BBC One.