Neil Gaiman has revealed new details about his upcoming episode of Doctor Who.

The fantasy author told SFX that 'The Doctor's Wife' will take the show's lead character "back to his roots".

"[It's set on] a junkyard planet," he revealed. "If I can't actually take them back to [the setting of the first ever episode] Totter's Lane, then I can take them back to somewhere which I described in the script as 'the Totter's Lane at the edge of the universe'."

He added that the original inspiration for the instalment was "a desire to go further into the Tardis than we'd been before".

"When I was thinking of ways I could go further into the Tardis, I suddenly had this idea for a plot creep up at right angles to me," he said. "I got to do something that you're only allowed to do once."

Gaiman previously confirmed that he was "impressed" with the filmed version of his script, and also dismissed suggestions that the episode was limited by budget restrictions.

Doctor Who continues this Saturday on BBC One in the UK and BBC America in the US. Gaiman's episode will air the following week.

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