|Directed by||Mark Ezra
|Produced by||Dick Randall
|Written by||Mark Ezra
|Music by||Harry Manfredini|
|Editing by||Jim Connock|
|Studio||Spectacular Trading International|
|Distributed by||Vestron Pictures|
|Running time||91 minutes|
The day begins with a popular student, Carol Manning (Caroline Munro), jokingly asking Marty Rantzen (Simon Scuddamore), the school nerd, to have sex with her in the women's locker room. After he removes his clothes, Marty is surprisingly exposed to a group of students who tease him in several ways, including jabbing at his crotch with a javelin, giving him an electric shock and dunking his head into a toilet bowl. This prank ends when the students' coach comes in to find out what is happening.
The students are forced to perform a vigorous workout in the gymnasium. Still, two students give Marty a marijuana joint laced with poison, which he smokes in the science lab where he is working on a chemistry project. The joint makes him so sick he runs to the men's room to vomit. While he is gone, Skip, one of the popular kids, rigs the experiment to explode in Marty's face.
Upon Marty's return, the set-up works, causing Marty to panic, and a great fire to erupt in the lab after he knocks over a Bunsen burner. In the struggle, Marty accidentally bumps into a shelf where a precariously placed jug of acid sits, causing the jug to fall and break, which splashes acid on Marty's face, leaving him horribly disfigured. The sound attracts the attention of the students, who stand by the door in shock.
Years later, those behind the prank are invited back to the school for a reunion. Upon arriving, they discover that the campus was shuttered years ago and the building is in disrepair, awaiting demolition. They begin to think that one of the former students was behind the invitations, but everyone denies it.
They decide to break into the school to hang out and drink alcohol, and come across a room containing their old school lockers, which to their surprise are filled with their old belongings. They notice Marty's old locker, and the alumni begin questioning what happened to him after the prank-gone-awry. Skip tells them that Marty is doing fine and probably forgot all about what happened. He has supposedly been in a mental institution.
The first victim is the caretaker, his head impaled on a coat peg by a mysterious killer dressed like a jester. Soon thereafter, the friends begin to die in gruesome ways: one guy's stomach explodes, one was stabbed in the back, one melts away in an acid bath, one shows up late and dies a mysterious death, two are electrocuted on a bed, and one is chopped up by a riding lawn mower. After all the deaths, Carol, Nancy and Skip were left and soon find that the bodies have disappeared. Skip was hanged on a rope but seemingly survives. Carol and Nancy investigates and find a room playing a video of Marty being bullied by them. Nancy runs by herself and chased by the Jester, but falls into a cesspit; the killer steps on her head when she tries to get out. Carol is left alone and discovers Susan's body before being chased by Marty into the old school. Carol mistakenly kills Skip as she buries the hatchet in his head. After a long run, Carol is impaled on a javelin pole. They quickly come to reveal that the Jester mask-wearing murderer is Marty himself, deranged and bent on revenge. All the former students wind up dead then come back as ghosts and the film closes with Marty apparently going insane. He wakes up in a mental hospital, restrained to a bed and wearing bandages on his face, having in fact dreamed the events of the massacre.
The film ends with Marty strangling the nurse, dressing in her uniform and jamming a syringe into the doctor's eye before peeling a chunk of skin from his own face.
- Caroline Munro as Carol Manning
- Simon Scuddamore as Marty Rantzen
- Carmine Iannaconne as Skip Pollack
- Donna Yeager as Stella
- Gary Martin as Joe
- Billy Hartman as Frank
- Michael Saffran as Ted Harrison
- John Segal as Carl Putney
- Kelly Baker as Nancy
- Sally Cross as Susan
- Josephine Scandi as Shirley
- Marc Smith as Coach
- Dick Randall as Manny
- Jon Clark as Digby
The film was shot in England, and many of the actors use fake American accents.
Simon Scuddamore, who plays the film's killer, committed suicide shortly after production of the film.
Much of the gore was cut prior to release to obtain an R rating. For its video premiere, the distributor Vestron Video released both the censored theatrical version and an unrated version that contained the excised violence.
Slaughter High was released as April Fool's Day on VHS in Japan only by Vestron International. To date, Japan is the only country to have a home video release of the film under its original title.
Lionsgate re-released the film to DVD on 4 January 2011 in a '4-Film Collection' set along with My Best Friend Is a Vampire, Repossessed and Silent Night, Deadly Night 3: Better Watch Out!. Arrow Video released a 'Special Edition' DVD in the United Kingdom in July 2011.
Slaughter High was released a third time on DVD in 2012 by Lionsgate in an eight horror film DVD set which also includes Class of 1999, Waxwork, 976-Evil II, The Unholy, C.H.U.D. II, Ghoulies III: Ghoulies Go to College and Chopping Mall.
- "Slaughter High (1986) - Trivia - IMDb". Internet Movie Database. Retrieved 25 July 2012.
- "Slaughter High DVD @ DVD Empire". dvdempire.com. Retrieved 25 July 2012.
- "My Best Friend Is A Vampire / Repossessed / Slaughter High / Silent Night, Deadly Night 3: Better Watch Out! (4-Film Collection) DVD @ DVD Empire". dvdempire.com. Retrieved 25 July 2012.
- Wheeler, Jeremy. "Slaughter High - Review - AllMovie". AllMovie. Retrieved 25 July 2012.