Having just returned from a mission to Mars, Commander Ross isn't exactly himself. He's slowly becoming a terrifying alien entity with one goal - to procreate with human women! When countless women suffer gruesome deaths after bearing half-alien offspring, scientist Laura Baker and hired assassin Press Lennox use Eve, a more tempered alien clone, to find Ross and his brood. Before long Eve escapes to mate with Ross.
Tommy Jarvis, tormented by the fear that maybe Jason isn't really dead, unwittingly resurrects the mass murderer for another bloody rampage.
Two psychotic young men take a mother, father, and son hostage in their vacation cabin and force them to play sadistic "games" with one another for their own amusement.
Martha Beck, an obese nurse who is desperately lonely, joins a "correspondence club" and finds a romantic pen pal in Ray Fernandez. Martha falls hard for Ray, and is intent on sticking with him even when she discovers he's a con man who seduces lonely single women, kills them and then takes their money. She poses as Ray's sister and joins Ray on a wild killing spree, fueled by her lingering concern that Ray will leave her for one of his marks.
During the summer of 1977, a killer known as the Son of Sam keeps all of New York City on edge with a series of brutal murders.
Tina Shepard, a telekinetic teenage girl, accidentally unchains Jason from his watery grave, allowing him to go on another killing spree in the area.
Jason ships out aboard a teen-filled "love boat" bound for New York, which he soon transforms into the ultimate voyage of the damned.
Jason Voorhees is tracked down and blown to bits by a special FBI task force, reborn with the bone-chilling ability to assume the identity of anyone he touches.
Three converging story lines involving bootleggers, a serial killer and drug dealers are followed. A former drug dealer tries to go straight, but comes across a stash of stolen drugs. Meanwhile, a middle-aged suburban housewife hides a sadistic and vicious streak.
As the residents of sorority house Pi Kappa Sigma prepare for the festive season, a stranger begins a series of obscene phone calls with dubious intentions...
It's Fourth of July Weekend, and the recently discovered corpse of Sgt. Sam Harper rises from the dead to punish the unpatriotic.