biographical article needs additional citations for verification. Its only attribution is to IMDb, which may not be a reliable source for biographical information. Please help by adding additional, reliable sources for verification. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful. (January 2010) Barry Van Dyke Born Barry Wayne Van Dyke July 31, 1951 (1951-07-31) (age 59) Atlanta, Georgia, USA Occupation Actor, Writer, Director, Presenter Years active 1962-present Spouse Mary Carey (1974-present) 4 children Barry Van Dyke (born July 31, 1951) is an American actor and the second son of actor and entertainer, Dick Van Dyke, and nephew of Jerry Van Dyke. He has one older brother, Christian, and two younger sisters, Stacy and Carrie Beth. He is best-known to audiences as Mark Sloan's (played by Dick Van Dyke) fictional son and police officer partner, Lieutenant Detective Steve Sloan, on Diagnosis: Murder, in which fictional relatives were typically played by real-life ones..