Prom Night III: The Last Kiss (1990)
aka: Hello Mary Lou: Le Bal De L’horreur III
Mary Lou (Courtney Taylor), the prom queen burned to death by her boyfriend back in 1957, has escaped from hell and is once again walking the hallways of Hamilton High School looking for blood. She chooses as her escort in world of the living Alex (Tim Conlon), an average student with dreams of one day becoming a doctor. As Mary Lou begins to get back into form, the body count starts climbing and the graduating class of Hamilton High is once again smaller than expected. Also stars Cynthia Preston and David Stratton.