After "The Munsters" ended, Patrick continued to appear in guest-starring roles on various popular television series of the 1960s, including "I Dream of Jeannie", "Death Valley Days", "Gunsmoke", "The Monkees", "Daniel Boone", and "Adam-12", as well as a recurring role as Gordon Dearing on the CBS family comedy series "My Three Sons". During this time, Patrick also appeared in several Walt Disney films, including "Way Down Cellar", "The Young Loner" and "The One and Only, Genuine, Original Family Band", as well as portraying the role of Milo in the 1970 MGM live-action/animated film "The Phantom Tollbooth".