Ian Marter was an actor and novelist. He was best 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. Marter continued his association with Doctor Who long after leaving the show, adapting several stories for the Target novelisation range, and penning an original novel, Harry Sullivan's War. In addition to these books, Marter wrote adaptations of several 1980s American films such as Splash and Down and Out in Beverly Hills for Target and its imprint, Star Books, as well as the Gummi Bears books. With the exception of Down and Out in Beverly Hills, these books were published under the pen name Ian Don - Don being his middle name. Marter died in 1986, on his 42nd birthday, from a heart attack associated with diabetes-related cardiovascular disease.