How many movies have Booth Colman and Gerald Perry Finnerman collaborated on?

They have worked on 4 movies together! Their first movie together was In the Glitter Palace (1977) while their highest rated movie together was The Forgotten City of the Planet of the Apes (1980). They have not worked together since Farewell to the Planet of the Apes (1980). They are most known for their tv movie films together.