How many movies have Cynthia H. Margulis and Karen L. Spencer collaborated on?

They have worked on 6 movies together! Their first movie together was Beach Babes from Beyond (1993) while their highest rated movie together was Beach Babes 2: Cave Girl Island (1995). They have not worked together since Beach Babes 2: Cave Girl Island (1995). They are most known for their science fiction films together.