Whovians who are also “Game of Thrones” fans have been waiting for this episode of “Doctor Who” for months. Maisie Wiliams, who plays Arya Stark on the HBO drama, will appear in Season 9, episode 5 of the BBC America cult hit. Not much is known about her mysterious role, but new videos reveal a little bit more about her character.

The sneak-peek clip shows William’s character, Ashildre, working with Clara (Jenna Coleman). They’re trapped in a room with a bunch of Vikings and trying to escape. They attempt to open a door – which looks seriously out of place next to the Vikings – while another wall moves in, seemingly about to crush everyone in the area. However, the clip ends before the women can open the door.

Watch the sneak peek of Doctor Who” Season 9, episode 5 below:

The clip doesn’t indicate much about the episode, but luckily, BBC America released an introduction video that gives a little more information. The Doctor (Peter Capaldi) and Clara arrive in a Viking village and are immediately taken prisoner. “The Doctor reacts in a very un-Doctor-ly fashion, and tells everyone to run,” Coleman explains.

The introduction video also features a clip of Williams telling one of the aliens that she is a Viking who is ready for battle. Watch below:

Not much is known about Ashildre. Fans have been trying to piece together clues about her character for months based on her short appearances in trailers. In another video, Williams said that there was both a positive and negative side to all the buzz.

“It’s so nice to know that there is a bit of hype around it before it comes out,” Williams told BBC America. “But it also is a lot of pressure too because now you’ve got to do these two episodes and people have got to like them.” Watch her talk about the excitement below:

“Doctor Who” fans might not learn everything they need to know about Williams’ character in episode 5. She’ll be around for two episodes, titled “The Girl Who Died” and “The Girl Who Lived,” so fans should probably expect Williams to be involved in a cliffhanger.

“Doctor Who” Season 9, episode 5 airs Saturday at 9 p.m. EDT on BBC America.

Doctor Who GoT Maisie Williams Clara (Jenna Coleman, left) and Ashildre (Maisie Williams) work together in "Doctor Who" Season 9, episode 5. Photo: BBC America/BBC Worldwide Doctor Who Maisie Clara (Jenna Coleman, left) holds Ashildre's (Maisie Williams) hand in "Doctor Who" Season 9, episode 5. Photo: BBC America/BBC Worldwide Maisie Williams GoT Doctor Who Maisie Williams plays Ashildre in two episodes of "Doctor Who" Season 9, titled “The Girl Who Died” and “The Girl Who Lived” -- but which title refers to her fate? Photo: BBC America/BBC Worldwide Doctor Who Maisie Williams episode Maisie Williams appears as Ashildre in "Doctor Who" Season 9, episode 5. Photo: BBC America/BBC Worldwide