Peter Haydon

Peter Haydon was a member of Professor Parry's expedition to Telos in search of the tombs of the Cybermen. When the expedition broke into groups to explore the tombs, he and Jamie McCrimmon explored the weapons testing room. There they found a Cybermat. They manipulated some buttons that showed some hypnotic pictures on a screen. Haydon wanted to try an experiment and had Jamie push some controls. Just as the Second Doctor and the others entered, a Cyberman dummy came into the room and a weapon came out of the back wall. Haydon was in the path of the dummy and was shot and killed by the weapon. (TV: The Tomb of the Cybermen)