How many movies have Erle Stanley Gardner and Ronn Rynhart collaborated on?

They have worked on 25 movies together! Their first movie together was Perry Mason Returns (1985) while their highest rated movie together was Perry Mason: The Case of the Heartbroken Bride (1992). They have not worked together since Perry Mason: The Case of the Telltale Talk Show Host (1993). They are most known for their crime films together.