Steven Moffat, the head writer on Doctor Who, has explained there are no plans for a Doctor Who movie. Moffat explained there is simply no way the project is feasible, not only from a financial point of view but in terms of creating a film which will be on a large enough scale to match the show's enormous cultural impact.

Doctor Who
Doctor Who currently stars Jenna Coleman as the assistant to Peter Capaldi's Doctor.

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"No one has ever squared the circle on that. How do we do this?" Moffat said of making a Doctor Who movie during a recent interview. "How do we do it without leaching from the television series - which we're not allowed to do, because Doctor Who is public funded? If it's going to be a different Doctor, are we going to try and sell two Doctors at the same time? I know there's been loads of Doctors, but there's only been one at a time. You don't have a James Bond on television and one in the cinema. If he's the same guy, then when are we going to make that?"

Moffat also commented on the sheer size of the cultural phenomenon that is Doctor Who and attempted to imagine the kind of film which could reflect this.

"We're talking one of the biggest TV shows in the world. It can't just be a medium-size movie - it's gotta be a colossal movie," Moffat said. "I've sat with people, saying -and in the end it's not my decision or my choice, I don't own Doctor Who - 'Okay, explain to me how it's going to work.' And nobody has an answer."

Moffat also responded to rumours about the possibility of a Doctor Who and Sherlock crossover. Moffat is the co-creator of Sherlock, the modern day embodiment of the Arthur Conan Doyle's detective which stars Benedict Cumberbatch and Martin Freeman

We're not sure who thought a Sherlock-Doctor Who crossover would be a good idea but some fans of the show have certainly been pushing for it. Moffat was initially more than willing to go along with the project because it was something the fans wanted. Fortunately, Moffat explained he had been convinced by his Sherlock co-creator, Mark Gatiss, Sherlock producer Sue Vertue, Cumberbatch and Freeman that the crossover is not a good idea. 

"My instinct-and this is probably from years of doing Doctor Who-is I'm just such a tart," Moffat says. "If people want it, we should give it to them. But I got persuaded by Mark, Benedict, Sue and Martin who said, 'Look, it will never be as good as [fans] think it's going to be.' And then I say, 'Yes but we'll just bang it out and make it as good.' Yeah, but you can't give everybody everything they want all the time. But I'm in the camp of giving them everything they want! But I think they're sane and right, and I'm just a tart."

Moffat was interviewed by Entertainment Weekly.

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Benedict Cumberbatch and Martin Freeman in Sherlock.