Spencer (Doctor Who and the Silurians)

Spencer was a junior technician at the Wenley Moor nuclear research facility.

Biography
Spencer and his colleague Davis went potholing in the caves under Wenley Moor, where they were attacked by a dinosaur. Davis was killed, and Spencer succumbed to race memories of Silurians.

He was then taken to the sickbay of the facility and put under the care of Dr. Meredith. He used a marker pen Dr. Meredith had given him to draw pictures of Silurians and other creatures on the wall of his room, which he had been doing since waking from his coma.

Spencer later tried to strangle the Third Doctor, who had asked about a drawing of a Silurian, but after the Doctor calmed him down Spencer resumed his drawing. (TV: Doctor Who and the Silurians)