Handsome, likable leading man, almost exclusively on TV, best known as the playful Dr. G. Alonzo 'Gonzo' Gates on the long-running dramatic series, "Trapper John, M.D." Besides trying his hand at several other series, the athletic, curly-haired Harrison has also kept busy in many "Battles of the Network Stars," TV-movies and miniseries, including "Centennial" (1978-79), "For Ladies Only" (1981, as a male stripper), "Picnic" (1986) and "Breaking the Silence" (1992). He has also played leading roles in such feature films as "Razorback" (1984), "Dangerous Pursuit" (1990) and "It's My Party" (1996). In 1997, he made his Broadway musical debut as the disreputable emcee of a marathon dance in the Kander and Ebb musical "Steel Pier."