How many movies have Paul Staheli and Richard Jury collaborated on?

They have worked on 4 movies together! Their first movie together was Donner Pass: The Road to Survival (1978) while their highest rated movie together was Perry Mason: The Case of the Sinister Spirit (1987). They have not worked together since Perry Mason: The Case of the Glass Coffin (1991). They are most known for their drama films together.