How many movies have Dean Hargrove and James Nasella collaborated on?

They have worked on 5 movies together! Their first movie together was Perry Mason: The Case of the Shooting Star (1986) while their highest rated movie together was Perry Mason: The Case of the Silenced Singer (1990). They have not worked together since Perry Mason: The Case of the Silenced Singer (1990). They are most known for their mystery films together.