Theodore William Lange III is an American actor, director and screenwriter best known for his roles as bartender Isaac Washington in the TV series The Love Boat (1977-1986) and Junior in That's My Mama (1974-1975).

Love Boat: The Next Wave is an American comedy television series that aired on UPN from April 13, 1998 to May 21, 1999. It was a revival of the original 1977–1986 ABC television series The Love Boat.