Thaddeus Kanner
From Tardis Wiki, the free Doctor Who reference
Thaddeus Kanner was an expert mountaineer who often explored for mystical beings. He went up Ben MacDui with the Seventh Doctor, Alistair Gordon Lethbridge-Stewart and Niamh Godec and did not like taking advice. He wanted to hunt the Grey Man. After looking at the Grey Man's face he started acting paranoid. (AUDIO: The Grey Man of the Mountain)