Mark Gatiss has said his new docu-drama shows the fight to get Doctor Who made - as the sci fi show did not originally have the full backing of TV bosses.
The Sherlock star wrote An Adventure In Space And Time, a new drama about the creation of the hit show, which is about to celebrate its 50th anniversary.
Mark revealed: "There was quite a lot of resistance. And obviously no one liked the Daleks, they thought it was going to be a disaster! And then after they went out everyone proved them wrong.
"So there are lots of things which really are more about the technical difficulties of making a television programme, other things that are about the technical human aspect of fighting for something you believe in."
The League Of Gentlemen star revealed he is looking forward to seeing Peter Capaldi taking on the role of the next Doctor.
He said: "The funny thing is that the radical thing to do now is to make the Doctor older. I can remember when Peter Davidson was cast, people said, 'The Doctor can't possibly be that young!'
"And now it's so strange, people say 'How can the Doctor be 55 years old?'
"Peter [Capaldi], immediately you look at him there's a sort of fierceness to him, and it's just very exciting to think where that might go."
As for lasting another 50 years, Mark thinks Doctor Who "as an idea and a concept, is with us forever."