Charles Kettering

Professor Charles Kettering was a scientist and 's assistant on the Keller Machine.

Biography
Kettering demonstrated the machine's first use in Stangmoor Prison to the press, among whom was James Stevens. The Third Doctor continuously interrupted Kettering during his elucidation about the Keller process. After Barnham, the one-hundred-and-thirteenth person to undergo the process, had an odd reaction, the Doctor claimed that the Keller Machine was a new and unusual menace to mankind. (TV: The Mind of Evil, PROSE: Who Killed Kennedy)

Kettering refused to listen to the Doctor's warnings about the Keller Machine's dangers, and it was while checking over the machine, shortly after the mysterious death of observer Arthur Linwood, that it mysteriously self-activated and killed him by turning his fear of drowning against him.

Kettering had been afraid of water ever since he was a child, when he had nearly drowned in a boating accident; and still couldn't swim or even get into a boat. (PROSE: The Mind of Evil)

His fear was so great that water manifested in his lungs, causing him to drown in the perfectly dry Process Theatre. (TV: The Mind of Evil)