"Doctor Who" fans can look forward to at least another five seasons of the cult sci-fi series, showrunner Steven Moffat assures.

“I thought it would last ten years," he told "Doctor Who Magazine" (via Radio Times), referring to the 2005 revival. "I didn’t think it would last ten years with BBC Worldwide trying to get me in a room to talk about their plan for the next five years!"

"It’s going to do a minimum of 15. I mean, it could do 26!" continued Moffat, who took over from Russell T Davies in 2010. "That’s not to say its easy," he told Doctor Who magazine. "It’s not easy to find new people. It’s not easy to find new Doctors. That could be the danger – that you start to think that it’s easy. There’s nothing easy about doing 'Doctor Who.'”

However, the BBC apparently thinks Moffat is being conservative about the show's life expectancy.

“Because it’s such an amazing format, because you can constantly revive it and re-imagine it, then as long as the people looking after it are passionate about it and the BBC is passionate about it," said Ben Stephenson, head of BBC drama, "there’s absolutely no reason why it can’t do another 50 years."