BBC America has released the first look at “Game of Thrones” star Maisie Williams guest-starring on “Doctor Who” as Viking girl Ashildre, who is part of a clan that the Doctor (Peter Capaldi) and Clara (Jenna Coleman) must train to defend themselves against a deadly threat.

In the clip of “The Girl Who Died,” Clara and Ashildre desperately try to save themselves and Ashildre’s fellow Vikings from a death chamber whose walls are closing in fast.

BBC America also released a short interview with the “Game of Thrones” star, talking about how great the two fandoms colliding has been.

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“When it was announced that I would be on ‘Doctor Who,’ everyone lost their minds a little bit because you’re crossing over fandoms,” says Wiliams, comparing it to her co-star Sophie Turner getting a part in “X-Men”. “When you cross over to a different geeky fandom world, everyone’s like, ‘This is insane!’ So it was such a nice buzz.”

However, she says there’s also a lot of pressure.

“It’s nice to know that there’s a bit of hype around it before comes out, but it also is a lot of pressure too because now you’ve got to two these two episodes and are people going to like them? I hope it lives up to everyone’s expectations and I can’t wait to see how people like it,” says Williams.

Williams’ “Doctor Who” two-episode arc begins Saturday, Oct. 17 at 9 p.m. ET/PT on BBC America.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."