Doctor Who show runner Steven Moffat, seen here in fifth Doctor Peter Davison's The Five(ish) Doctors Reboot in 2013, wants to hear from Sir Peter Jackson.

Sir Peter Jackson is being urged to contact Doctor Who producers so they can make an episode together.

Wales based Doctor Who show runner Steven Moffat told the UK's Metro magazine he was still keen for the New Zealand based movie director to direct an episode of the long running science-fiction television show.

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"He's a genuine big old Doctor Who fan," Moffat said of Jackson. "He's mentioned it, and then we email him and he doesn't reply."

Jackson told the Doctor Who producers to name a time and place for him to direct an episode after 11th Doctor actor Matt Smith suggested it in 2012. That Christmas Jackson, who worked alongside Moffat on The Adventures of Tintin in 2011, met with the show runner to discuss the idea. Later in, 2013, Jackson told Entertainment Weekly he'd waive his usual fee and direct Doctor Who for a gold Dalek prop.

Since then Jackson has gone quiet and Peter Capaldi has replaced Smith as the Doctor.

Moffat told Metro there was a disparity between their aspirations.

"I think his plan is we all go to New Zealand and spend six months making it and our plan is he comes to Cardiff and makes it in 12 days. There's that disparity," Moffat said.

"I'm not quite sure what a movie director, that can do anything he likes, gets out of our budget and our schedule. The skill set required is pretending you're Peter Jackson without a budget."

Jackson was thought to be waiting until after he had finished The Hobbit movie trilogy before heading to the TARDIS. The last of the special, extended, cuts of those films based on JRR Tolkien's book is due to be released next week on DVD and High Definition Blu-ray.

"I think his schedule is difficult, I don't know," Moffat said. "But maybe, maybe. Come on Peter, it's a challenge!"

Moffat, also one of the producers behind Sherlock, also voiced interest in a Doctor Who crossover with the recently announced new Star Trek television series. While this has never been done on film before it has been done in comic series.

Doctor Who airs on Prime on Sundays at 7.30pm.