In the new two-part Doctor Who adventure, which kicks off this Saturday on BBC America, Peter Capaldi’s Doctor and Jenna Coleman’s Clara must train a band of Vikings to defend themselves against the galaxy’s most deadly army. So far, so business-as-usual (at least if you are a two-hearted alien Time Lord).

What makes this adventure particularly noteworthy is the presence in the cast of Game of Thrones star Maisie Williams, who plays a Viking girl named Ashildre.

You can see Coleman and Williams in a just-released clip from Saturday’s episode, above. And you can see Williams talking about this coming together of the Who and Thrones worlds, below.

This article originally appeared on EW.com

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