How many movies have Alan Hale Jr. and Jim Backus acted in together?

They have worked on 5 movies together! Their first movie together was Advance to the Rear (1964) while their highest rated movie together was The Castaways on Gilligan's Island (1979). They have not worked together since The Harlem Globetrotters on Gilligan's Island (1981). They are most known for their comedy films together.