How many movies have Raymond Chow Man-Wai and Thomas K. Gray collaborated on?

They have worked on 2 movies together! Their first movie together was A Show of Force (1990) while their highest rated movie together was Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991). They have not worked together since Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991).