Vulsturg the Vast was a Space Viking from Norsum. Like Thaur and Jotastar the Just, they were banished from their homeworld by Queen Angboda and left on a different planet. Vulsturg was bound to a rock on an unnamed planetoid, where the sound rendered the giant Viking unconscious. He was the second Viking to be rescued by the Tenth Doctor (after Thaur). (COMIC: The Screaming Prison)
Tardis