A college fraternaty prank goes bad and student ends up in the mental ward. Four years later, it's graduation time, and the members of the fraternity decide to have a costume party aboard a train trip to celebrate thier graduation. Unknowingly to them, a killer has slipped aboard, wacking them off one by one, disguised in the costumes of the victims.

While taking a shower, Kate Miller, a middle-aged, sexually frustrated New York City housewife, has a rape fantasy while her husband stands at the sink shaving. Later that day, after complaining to her psychiatrist Dr. Robert Elliott about her husband's pathetic performance in bed, she meets a strange man at a museum and returns to his apartment where they continue an adulterous encounter that began in the taxicab. Before she leaves his apartment, she finds papers which certify that the man has a venereal disease. Panicked, Kate rushes into the elevator, but has to return to his apartment when she realizes she's forgotten her wedding ring. When the elevator doors open, she's brutally slashed to death by a tall blonde woman wearing dark sunglasses. Liz Blake, a high-class call girl, is the only witness to the murder and she becomes the prime suspect and the murderess's next target. Liz is rescued from being killed by Kate's son Peter, who enlists the help of Liz to catch his mother's ...

A New York anthropologist named Professor Harold Monroe travels to the wild, inhospitable jungles of South America to find out what happened to a documentary film crew that disappeared two months before while filming a documentary about primitive cannibal tribes deep in the rain forest. With the help of two local guides, Professor Monroe encounters two tribes, the Yacumo and the Yanomamo. While under the hospitality of the latter tribe, he finds the remains of the crew and several reels of their undeveloped film. Upon returning to New York City, Professor Monroe views the film in detail, featuring the director Alan Yates, his girlfriend Faye Daniels, and cameramen Jack Anders and Mark Tomaso. After a few days of traveling, the film details how the crew staged all the footage for their documentary by terrorizing and torturing the natives. Despite Monroe's objections, the television studio Pan American still wishes to air the footage as a legitimate documentary...

Mike, a young teenage boy who has just lost his parents, is afraid to lose his brother. This fear causes him to follow his brother to a funeral, where Mike witnesses the Tall Man lift a coffin on his own. Mike decides to investigate and discovers a horrible world where the Tall Man, along with his flying spheres, shrink the to half their normal size and reanimate them as slaves. It is then up to Mike, his brother, and Reggie the ice cream man to stop the Tall man.

When flesh-eating piranhas are accidently released into a summer resort's rivers, the guests become their next meal.

Ostracized at a snooty private school because of her rural, poor background, a scholarship student is...