How many movies have Vincent Baldino and William R. Moses collaborated on?

They have worked on 3 movies together! Their first movie together was Perry Mason: The Case of the All-Star Assassin (1989) 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 tv movie films together.