How many movies have Dennis Robertson and Mariette Hartley acted in together?

They have worked on 4 movies together! Their first movie together was Marooned (1969) while their highest rated movie together was M.A.D.D.: Mothers Against Drunk Drivers (1983). They have not worked together since M.A.D.D.: Mothers Against Drunk Drivers (1983). They are most known for their tv movie films together.