How many movies have Harold P. Warren and John Reynolds collaborated on?

They have worked on 2 movies together! Their first movie together was Manos: The Hands of Fate (1966) while their highest rated movie together was Mystery Science Theater 3000: Manos: The Hands of Fate (1993). They have not worked together since Mystery Science Theater 3000: Manos: The Hands of Fate (1993).