How many movies have Cathy Yuzna and George R. Groves Jr. collaborated on?

They have worked on 2 movies together! Their first movie together was Silent Night Deadly Night 4: Initiation (1990) while their highest rated movie together was Silent Night, Deadly Night 5: The Toy Maker (1991). They have not worked together since Silent Night, Deadly Night 5: The Toy Maker (1991).