John Angus Mackay

John Angus Mackay was Professor Edward Travers companion on his expedition to the Himalayas in 1935. He was killed by a robot yeti when they were sleeping in their camp. Travers caught a glimpse of the furry creature which led him to believe the Second Doctor (wearing his giant shaggy coat) murdered John. (TV: The Abominable Snowmen)

In an alternate version of Earth, John survived the expedition in the Himalayas and Travers did not. (PROSE: The Schizoid Earth)

Behind the scenes
John is named Mackay in the novelisation and Angus Mackay in the novelisation of The Web of Fear. The Schizoid Earth gave his full name as John Angus Mackay.