“Game of Thrones” star Maisie Williams will make her second appearance on “Doctor Who” Saturday, but it’ll be very different from her first. In episode 5, Williams’ sweet and innocent character Ashildre was made immortal. The Doctor (Peter Capaldi) and Clara (Jenna Coleman) will run into her a few hundred years later in episode 6. Her face still looks the same in new photos from the episode, titled “The Woman Who Lived,” but she is clearly very different.

According to BBC America's captions, Ashildre changed her name. When she is in a corset, she is listed as Me. When she is in the mask, she is listed as the Highwayman.

Doctor Who Maisie Williams Maisie Williams as the Highwayman in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America Dr Who Maisie Williams Maisie Williams as Me in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America

As previously reported, the Highwayman, also known as the Knightmare, is the criminal that catches the Doctor’s attention after she gets her hands on some alien technology. Why is Williams’ character looking for alien tech? It might have something to do with someone she is working with. She is pictured alongside Leandro (Ariyon Bakare), a man with a lion face who we presume is an alien.

Doctor Who 906 Are Leandro (Ariyon Bakare) and Me (Maisie Williams) working together? Photo: BBC Worldwide/BBC America Dr Who 906 2 Me (Maisie Williams) and Leandro (Ariyon Bakare) in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America Dr Who 906 3 Leandro (Ariyon Bakare) appears in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America

After living so many lifetimes, Ashildre/Me/the Highwayman is very different from the Viking girl the Doctor revived. The two look to be facing off in some photos, but working together in others. Either way, the Doctor likely doesn’t approve of her actions. He has never been a fan of criminals, and he especially hates guns.

DW 906 1 Maisie Williams and Peter Capaldi star in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America DW 906 2 The Doctor (Peter Capaldi) speaks to the Highwayman (Maisie Williams). Photo: BBC Worldwide/BBC America DW 906 3 The Doctor (Peter Capaldi) and Me (Maisie Williams) face off in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America DW 906 4 The Doctor (Peter Capaldi) is yelled at by Me (Maisie Williams) in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America DW 906 5 Peter Capaldi teams up with "Game of Thrones" star Maisie Williams in "Doctor Who." Photo: BBC Worldwide/BBC America DW 906 6 The Doctor (Peter Capaldi) follows the Highwayman (Maisie Williams) in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America

The episode 6 photos also show the Doctor with a pair of new sunglasses. In episode 5, his sonic sunglasses were broken in two, but did he replace them with a normal pair of shades? Capaldi hinted that the glasses were only temporary until he got a new sonic screwdriver. Check out more photos from “Doctor Who” Season 9, episode 6 below:

DW 906 7 The Doctor (Peter Capaldi) rocks out in the sixth episode of "Doctor Who" Season 9. Photo: BBC Worldwide/BBC America DW 906 8 What kind of machine is the Twelfth Doctor (Peter Capaldi) using in "The Woman Who Lived"? Photo: BBC Worldwide/BBC America DW 906 9 "Game of Thrones" actress Maisie Williams has traded in Arya Stark's swords for the Highwayman's guns on "Doctor Who." Photo: BBC Worldwide/BBC America DW 906 10 The Doctor visits 1651 in "Doctor Who" Season 9, episode 6. Photo: BBC Worldwide/BBC America DW 906 11 Maisie Williams' "Doctor Who" character goes by several different aliases in episode 6. Photo: BBC Worldwide/BBC America

While this is Williams’ last scheduled episode, she may return to the sci-fi series in the future. “Everyone's been asking if she comes back. I hope so, but I have no idea,” Williams told Digital Spy. “I know they've had characters similar to Ashildre that have returned in future episodes and series, so we'll see. I think there's a good chance!”

“Doctor Who” Season 9, episode 6 airs Saturday at 9 p.m. EDT on BBC America.