It all started exactly 13 years ago, when Mary Graves' older sister was murdered on Halloween prom night by a power-mowing maniac. Poor Mary...since then she has experienced horror, sexual frustration, even psychoanalysis, but she still sees little lawnmowers everywhere. But tonight will be different. Tonight, at the new Halloween Prom, all the questions of the past 13 years will be answered as the pumpkin headed killer has returned. But hot on their trail is an obsessed cop (Joe Don Baker) who won't allow history to repeat itself.
Joe Don Baker as Dick Harbinger
Stella Stevens as Mrs. Doctor Graves
George Kennedy as Mr. Doctor Graves
Julia Duffy as Mary Graves
Scott McGinnis as Norman Bates
Elizabeth Daily as Bambi
Michele Tobin as Rosie
Andrew Dice Clay as Tony Schlongini (credited as Andrew Clay)
Anthony James as Zeke
Sonny Carl Davis as The Weirdo (credited as Sonny Davis)
David Drucker as The Looney
Jeff Altman as Harry Palms
Victor Brandt as Dr. Moreau
Wil Albert as Dr. Denton
Charles Napier as Chief O'Hara
The film was released theatrically in the United States by Jensen Farley Pictures in January 1983. The film was released on VHS by Vestron Video. It has still not officially been released on DVD.
Allmovie wrote "Wacko virtually vanished from the face of the earth, which, as it turns out, isn't necessarily a bad thing. For its hundreds of gags and zingers, there are actually very few laughs in a seemingly endless 84-minute running time."