Peter Haydon

Peter Haydon was a member of Professor Parry's expedition to Telos in search of the tombs of the Telosian Cybermen in the 25th century.

Biography
When the expedition broke into groups to explore the tombs, Haydon and Jamie McCrimmon explored the weapons testing room, where they found a Cybermat. (TV: The Tomb of the Cybermen)

In this room, Jamie and Haydon met a Krelos robot drone who tried to attack Jamie. This was so that Jamie could be cleaned of the nanites which would infect the TARDIS. (AUDIO: Return to Telos)

Jamie and Haydon 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, Victoria Waterfield and John Viner 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)