How many movies have Jim Backus and Sherwood Schwartz collaborated on?

They have worked on 3 movies together! Their first movie together was Rescue from Gilligan's Island (1978) 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 tv movie films together.