Doctor Who Trailer and Photos: Game of Thrones' Maisie Williams as a Viking! 

‘ Maisie Williams has traded Winterfell for Old Norse times — but as the accompanying trailer and first-look photos show, she’s still playing a tough cookie on this Saturday’s installment of

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In the first of a two-part story, “the Doctor (Peter Capaldi) and Clara (Jenna Coleman) must train a useless band of Vikings” — including Williams’ plucky Ashildre — to “defend themselves against the galaxy’s most deadly army,” according to the network.

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Williams told TVLine on the Emmys red carpet last month that “Everyone’s prediction is wrong” about her character on the long-running British sci-fi series.

Check out the trailer above — and then a behind-the-scenes video and TVLine’s Q&A below. After that, scroll down for eight fresh images of Williams as Ashildre —

or click here for direct access — then hit the comments with your thoughts!

Clara really hasn’t been very competent this season.

She’s clearly still traumatized. Her reaction in the last episode when the Doctor told he he would die hinted at it.

When are they going to have more episodes that take place not on Earth? I’d also like to see a Companion who isn’t from Earth, like Adric, Leela or Nyssa….

Imagine if Williams is playing Missy earlier in her timeline. Who says Saxon regenerated into Missy as we know her? He might have regenerated into a younger girl…

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