Doctor Who star Matt Smith has said he finds it difficult to find other acting roles which measure up to playing the Time Lord.

The 28-year-old – who took over the role of The Doctor from David Tennant in 2010 – insisted he has no plans to step down as he cannot find any other part he would rather play.

“It’s so funny, I just read other scripts and go, ‘not as good as Doctor who!'” Matt said.

“For me, it’s a privilege to play this man,” he added. “These parts don’t come along that often. There was never any hesitation on my part to stay for another year.”

“Why would I quit? I’ve got Steven Moffat writing scripts, but not only that – Toby Whitehouse, Richard Curtis…all these great writers.

“And then of course, the part,” Matt pointed out. “I just love playing the Doctor, I’ve grown terribly fond of him. It’s something I really enjoy.”

The show, which returns to BBC One on Saturday, has been criticised for being too complicated for children to follow. However Matt said that different viewers could interpret it on different levels.

“My response is it’s like The Simpsons, which can be received on many levels,” he said.

“It’s only as complicated as you choose to make it. One of the reasons it’s doing well in America is there’s great detail and many layers, and in sci-fi culture that’s what they want.

“My mum always asks me loads of questions about it, but she still enjoys it. Still, that’s what’s great about Doctor Who, everybody’s got an opinion.”