Nollarr (The Girl Who Died)

Nollarr was a Viking warrior.

While out on a journey, with Hasten, Nollarr aided him in capturing the Twelfth Doctor and Clara Oswald.

After a two-day journey back to their village, Nollarr witnessed the Doctor's attempt to convince the group that he was Odin, the Norse King of the Gods, only for another another false Odin to appear in the sky and invite the village's best warriors to dine with him in Valhalla. A small group of Mire soldiers teleported down to Earth, and Nollarr was among those transported to their spaceship.

On board the spaceship, he was forced into a chamber where he was disintegrated, his adrenaline and testosterone harvested by the Mire. (TV: The Girl Who Died)

Behind the scenes
Nollarr was not identified on screen, only in the credits.