Varn (The Invasion of Time)
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Varn was commander of Castellan Kelner's bodyguard. Keller ordered him to protect the Fourth Doctor at all times and report back with everything the Doctor said or did. (PROSE: Doctor Who and the Invasion of Time) He understood the extent of Kelner's plotting and knew he would be rewarded if he agreed. He was shot and killed by Andred. (TV: The Invasion of Time)