Doctor Who showrunner Russell T Davies has revealed why the TARDIS has received an updated design for its new era.

Before Ncuti Gatwa assumes the mantle of the titular Time Lord of the BBC's long-running sci-fi smash in its fourteenth series, David Tennant has reprised his role in three 60th anniversary specials.

The trio of episodes star Tennant alongside returning character Donna Noble (Catherine Tate), as well as Heartstopper's Yasmin Finney, Miriam Margolyes and Neil Patrick Harris – and a brand new TARDIS design.

david tennant as the fourteenth doctor in doctor who, standing in front of the tardis with a brightly coloured backdrop
BBC

Related: Doctor Who's Ncuti Gatwa appears in updated version of An Adventure in Space and Time

Speaking to Digital Spy and other media at a screening of the show's first special, 'The Star Beast' – which aired on BBC One this evening (November 25) – Davies explained the iconic spaceship's "amazing" new look.

"I think I said: 'Big and white', which it really is," he said. "I've got to say to Phil [Sims], who designed it, it's such a piece of engineering. You've got to be able to walk on those walkways and run around.

"That's a proper working studio, with health and safety practices and things like that. Oh, my God, it's a piece of work."

russell t davies
Jeff Spicer//Getty Images

Related: Doctor Who releases first-look footage of Ncuti Gatwa with new companion Millie Gibson

Davies continued his explanation, adding that he didn't pluck the redesign out of nowhere.

"I actually did love over the past few years, Clara flew off in a white TARDIS and then Jodie Whittaker had the fugitive Doctor and she had a white TARDIS and I loved the white TARDIS.

"I kind of spent a couple of years thinking: 'Oh, I like that', not knowing I was coming back. It's funny. I didn't know I was coming back and nonetheless, you do sit watching, thinking, Oh, I'd do this, I'd do that. So that was handy."

doctor who's david tennant in the tardis
BBC//BBC

Related: Doctor Who cast share special message on 60th anniversary

Davies also added that Tennant had a characteristically excited response to the redesign.

"David loved it so much, he thought it would be absolutely brilliant to run around it. After eight takes, not quite so funny. He was worn out by the end."

In a callback to the very first Doctor's TARDIS, there's also a coffee machine, for any caffeine-deficient Time Lords or companions.

"They used to have a food machine that would serve you like eggs and bacon in the shape of a little tablet, and things like that... we haven't bought that back, but coffee will do."

Doctor Who returns for three 60th anniversary specials, beginning with 'The Star Beast' on November 25. The show airs on BBC One in the UK and Disney+ elsewhere.

Classic episodes of Doctor Who are now made available via BBC iPlayer in the UK as well.

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Charlie Duncan
Freelance News Reporter

Charlie Duncan is a freelance news reporter for Digital Spy.

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Deputy TV Editor

Previously a TV Reporter at The Mirror, Rebecca can now be found crafting expert analysis of the TV landscape for Digital Spy, when she's not talking on the BBC or Times Radio about everything from the latest season of Bridgerton or The White Lotus to whatever chaos is unfolding in the various Love Island villas. 

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