How many movies have Jim Mallon and Kevin Murphy collaborated on?

They have worked on 4 movies together! Their first movie together was Mystery Science Theater 3000: Santa Claus Conquers the Martians (1991) while their highest rated movie together was Mystery Science Theater 3000: The Movie (1996). They have not worked together since Return to Eden Prairie: 25 Years of Mystery Science Theater 3000 (2013).