Ian Marter

Ian Don Marter (28 October 1944 – 28 October 1986) was an English actor and writer, known for his role as Harry Sullivan in the BBC science-fiction television series Doctor Who from December 1974 to September 1975, with a non-regular, one-serial return in November and December 1975. He sometimes used the pseudonym Ian Don. Marter died suddenly of a diabetic heart attack on his 42nd birthday in 1986.