Michael Horton (born September 5, 1952) is an American character actor and voice over artist. Outside of Transformers, Horton's other voice work includes the roles of Rick Jones in the 1982 Incredible Hulk series (alongside Michael Bell's Bruce Banner) and Arn in The Legend of Prince Valiant. But he is most remembered for his long-running on-camera role as Grady Fletcher, the nephew of Angela Lansbury's character, on the television series Murder, She Wrote. In a case of life imitating art, Horton is married to actress Debbie Zipp, who played his fiancée (and later wife) on that series.