Derek (Bite of the Morphuse!)

Derek was the name of an alien acquaintance of the Eleventh Doctor who was "the best Elvis tribute act in the cosmos". Caught out by the Doctor doing a gig in Detroit in 1970, he obliged the Doctor by capturing, using his ship's teleporters, a gang of Morphuse that he agreed to drop off safely on an alien planet. (COMIC: Bite of the Morphuse!)