Her character Maeve Millay was last seen escaping into the Sublime, a virtual space inaccessible to humans, with her daughter in Westworld's intense season two finale.

And Thandie Newton got to work on set of the show's third season in Besalu, Spain, to film intense new scenes in the medieval town on Wednesday afternoon.

The actress, 46, kept a casual figure in a grey loose-fitting onesie, as she acted alongside a sharply dressed co-star who donned a grey waistcoat and trousers with a light blue shirt.

She's back! Thandie Newton got to work on set in Besalu, Spain, for Westworld's third season as the actress was spotted filming intense scenes with a male co-star on Wednesday

Thandie wore a concerned expression as she filmed with the actor a walkway along the city walls, which had been decked out with sandbags and barb wire.

Her raven locks were pulled back into a glamorous up-do, which harks back to her character's stylish ways from previous seasons.

The pair appeared to be deep in conversation as they spoke quietly during the scene, before her male co-star filmed with another actress.

During the dramatic shoot, the actor was seen running with a gun in hand as the actress, who was dressed in a chic red dress, sprinted alongside him.

Intense: The pair appeared to be deep in conversation as they spoke quietly during the scene

What happened? Thandie's character Maeve was last seen escaping into the Sublime, a virtual space inaccessible to humans, with her daughter in the show's season two finale

Thandie's sharp-tongued host is a staunch fan-favourite of the franchise, and her fate remained unclear following the second season's finale.

However, her appearance on set seems to mean that Maeve will escape her digital paradise to go out into the real world.

She's not the only host to have escaped Delos' Westworld park, as Evan Rachel Wood's Dolores seamlessly integrated with humans, while Bernard (Jeffrey Wright) was also revealed to be a host in the second season.

Dramatic: Thandie's male co-star was then seen filming a separate scene with another actress, in which he ran with a gun in hand as she sprinted alongside him

Aaron Paul is one of the show's newest cast members, with his as-yet-untitled character seeming to take centre stage in the third season.

The first teaser for the show was released on Monday, and gave fans a glimpse at what's to come in the future.

The clip paints an ominous outlook to life living among the advances of technology and artificial intelligence, while Evan's Dolores is also seen creeping out of the dark in the closing seconds of the trailer.

Season three of Westworld will return to HBO in 2020.