‘Doctor Who’ Releases New Season Trailer Ahead of Christmas Special

Doctor Who returns tonight for a Christmas special, “The Return of Doctor Mysterio,” but fans are getting another holiday present: a trailer for the new season, which will hit BBC America this spring.

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As seen above, it’s narrated by new companion Bill (Pearl Mackie) and shows her learning curve alongside the Doctor (Peter Capaldi): “What’s a Dalek?” she asks. Oh, she will learn.

There’s a lot of running, quipping, and, yes, drama. “I’m the Doctor,” Capaldi says in one clip. “I will save all your lives, and when I do, you will spend the rest of them wondering who I was.”

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The 12-episode Season 10 will be the final one for showrunner Steven Moffat, who’ll step down as head writer as well. Broadchurch’s Chris Chibnall, who has penned episodes of Doctor Who and its spinoff Torchwood, will then take the reins.

Doctor Who: The Return of Mysterio airs Dec. 25 at 9 p.m. on BBC America.