Theodore Martin McGinley is an American actor. He is known for his roles as Jefferson D'Arcy on the television sitcom Married... with Children, Charley Shanowski on the ABC sitcom Hope & Faith, and Derek on the Apple TV+ comedy drama series Shrinking. He was a late regular on Happy Days, Dynasty and The Love Boat and is known for playing the villainous role of Stan Gable in the film Revenge of the Nerds and several made-for-television sequels.