Frank Skinner thinks he was only cast by Steven Moffat in Doctor Who to stop him "begging" for a role on the show.
The comedian appeared as engineer Perkins and joked he was so desperate to appear in the sci-fi series, he may as well have camped in Moffat's garden because he asked so many times for a part.
Frank exclusive told BANG Showbiz: "Even as a kid I loved the show but I wouldn't have even thought of it as being a possibility.
"I have more or less begged for a part in it for some time. It was almost like I was camping in Steven Montfort's garden, as he put it. I think it was partly to shut me up but it worked."
With the episode featuring Frank running in mid-October, the actor admits he's still not stopped acting like a "grinning fool" when he's asked about his part in the programme.
"I wouldn't say I starred in 'Doctor Who'. But I was up there in the listings. That was just awesome.
"It is hard to describe it because negative things are more interesting in conversation than the positive things.
"I can only talk about it like a grinning fool really. On set I was like a competition winner. But I did worry about whether I could pull it off and stuff but I think it was alright."
Frank's latest comedy DVD, 'Frank Skinner - Man in a Suit' is out now on Blu-ray and DVD and also available on digital download.
Tagged in Doctor Who