How many movies have Erle Stanley Gardner and John Nance collaborated on?

They have worked on 4 movies together! Their first movie together was Perry Mason: The Case of the Murdered Madam (1987) while their highest rated movie together was Perry Mason: The Case of the Skin-Deep Scandal (1993). They have not worked together since Perry Mason: The Case of the Wicked Wives (1993). They are most known for their tv movie films together.