Rancher Cole Hillman seeks the help of college president Elgin Clark to combat thousands of rabbits that have invaded the area after their natural predators, coyotes, were killed off. Elgin asks for the assistance of researchers Roy and Gerry Bennett because they respect Cole's wish to avoid using cyanide to poison the rabbits. Roy proposes using hormones to disrupt the rabbits' breeding cycle and takes some rabbits for experimentation. One is injected with a new serum believed to cause birth defects. However, the Bennetts' daughter Amanda loves the injected rabbit, so she switches it with one from the control group. Amanda is then given the injected rabbit as a pet, but it soon escapes. While inspecting the rabbits' old burrowing areas, Cole and the Bennetts find a large, unusual animal track. Meanwhile, Cole's son Jackie and Amanda go to a gold mine to visit Jackie's friend Billy, but find him missing. Jackie finds more of the animal tracks in Billy's shed, while Amanda goes into the mine and runs into an enormous rabbit with blood on its face. Screaming in terror, she runs from the mine. Mutilated bodies begin to crop up around town, including those of Billy, a truck driver, and a family of four. Elgin, the Bennetts, Cole, and Cole's two ranch hands Frank and Jud go to the mine to try to kill the rabbits with explosives. As Elgin and Frank set charges on top of the mine, Roy and Cole enter the shaft to get pictorial evidence. Outside, a rabbit surfaces and attacks Jud before Gerry can shoot it. Roy and Cole escape the rabbits in the mine and run outside as the explosives are detonated. The explosives fail to kill the rabbits, and that night they attack Cole's ranch, killing Jud while Cole, Frank, Jackie, and Cole's housekeeper Dorothy escape into the storm shelter. The rabbits make their way to the general store, killing shopkeeper Mildred and eating and killing everyone else they find in the small town of Galanos before taking refuge in the buildings for the day. In the morning, Gerry and Amanda leave to avoid the coming press, but get stuck along a sandy stretch of road. Roy and Elgin update Sheriff Cody on the situation and, after realizing the rabbits have escaped the mine, call in the National Guard. As night falls, the rabbits leave Galanos to continue their rampage, making their way to the main town of Ajo and eating and killing everyone in their path. Cole proposes using a half-mile wide stretch of electrified railroad track as a fence to contain and kill the rabbits. They recruit a large group of people at a drive-in theater to help herd the rabbits with their car lights, with assistance from the machine gun fire of the National Guard. Thousands of rabbits make their way into the trap, where they are shot and electrocuted. At the film's ending, Cole tells Roy that normal rabbits, as well as coyotes, have returned to the ranch.

After performing an autopsy, pathologist Francis B. Gröss tells the viewer that he is interested in the transitional periods of life and death thanks to a recurring dream. At the same time, his experience as a pathologist has desensitized him to grotesque deaths. He has compiled footage to understand the many "faces of death." Footage is played of various deaths, including a man killed by an alligator, which Gröss calls a "violent retaliation from a creature who has suffered continued abuse from mankind". Gröss next narrates over recordings of assassinations, stating that humans are the only species to kill for greed. Assassin François Jordan is interviewed and admits that he kills solely for payment, not for political or social value. If there were a case on which he had thoughts, he would immediately, but respectfully, decline the mission. Gröss introduces another type of killer, "the one who kills for no apparent reason." A gunfight ensues between a SWAT team and an armed murderer. During the gunfight, the SWAT team throws tear gas into the house of the murderer, who is later shot, after which the team enters the killer's house to find his family stabbed to death; Gröss questions whether the man's actions were caused by society. As criminal Larry DeSilva is executed by electric chair, Gröss questions "if two wrongs make a right." Gröss visits the Los Angeles County coroner's office, where Dr. Thomas Noguchi is embalming multiple corpses after their autopsies. One cadaver is a horrifically bloated drowned woman; the other is a decapitated man whose skin is peeled off his skull for examination. Gröss asks Noguchi for his thoughts on his own embalming process after he dies, to which he replies: "life is purely a transitory state." One man, Samuel Berkowitz, has his body subjected to cryopreservation after death; his bodily fluids are replaced with a liquid with a low freezing point, then he is stored in a freezer to preserve his body for future science to revive him. The "theater of preservation" transitions to a brief discussion on suicide with footage of a woman jumping from a building; Gröss admits this was "a face of death he wishes never to face again." The next segment displays war and atrocities in history, including the Holocaust. Footage of German forces slaughtering enemy forces is shown, as they were becoming more desperate in the latter years of the war. The segment ends with footage of Nazis being obliterated in battle and symbols of Nazism destroyed, with Gröss saying that Hitler "lost control not only of his army but of his mind." Footage of animals dying due to litter and pollution is shown, followed by sick children in impoverished villages. Nature is examined with footage of a search party finding a body in a cave, a drowned man recovered at a beach, and footage of a bear mauling irresponsible campers. More of the "horrific nature of man" is examined with footage of a venomous snake cult in Louisville, Kentucky, killing a handler and a cannibalistic cult eating a cadaver stolen from a morgue before partaking in an orgy. Footage of several more tragic accidents is shown, culminating in a scene of a person attempting a parachute jump but dying after the parachute fails to open correctly. Gröss disputes the notion that this death was quick and painless, as he would have been conscious and aware of the entire fall to the ground. The segment ends with a section on PSA Flight 182 and its grisly aftermath, featuring photographs of the accident, excerpts of audio from air traffic control, and footage of scattered body parts and destroyed houses at the crash site in San Diego. Numerous witnesses are seen, including horrified people from the neighborhood and disgusted first responders. Gröss states the neighborhood smells like "rotting bodies and jet fuel" and that a mutilated body with only its torso and right hand "is the worst face of death." Gröss introduces his next topic, the role of supernatural forces in death. He meets with architect Joseph Binder, whose wife and son both died under tragic circumstances. Binder confides to the viewer that he believes his family remains as ghosts in his house, attempting to communicate with him. To verify this, Gröss enlists the services of parapsychologists. The team takes photographs of footprints and two apparitions. Binder communicates with his family's spirits through a medium, seemingly confirming the existence of life after death. After studying Binder's case, Gröss concludes that "when we die, it isn't the end" as "the soul in each of us remains a traveler forever." Gröss questions whether death is "the end of the beginning or the beginning of the end" and leaves the footage he has shown to the viewer's interpretation. The film ends with peaceful music, footage of a baby's birth, and photos of the child and its mother being together and happy.

Mourners gather around an old man (Lugosi) at his wife's grave site as an airliner overhead flies toward Burbank, California. Pilot Jeff Trent and his co-pilot Danny are startled by a bright light, accompanied by a loud noise. They see a flying saucer land in the cemetery near Jeff's house, where two gravediggers are killed by a ghoul (the reanimated wife of the old man). Lost in grief, the old man is struck and killed by a car in front of his home. Mourners at his funeral discover the gravediggers' corpses. When Inspector Daniel Clay and his police officers arrive, Clay goes alone into the cemetery to investigate. Jeff tells his wife, Paula (the old man's granddaughter), about his flying saucer encounter, saying that the Army has sworn him to secrecy. Another saucer lands, and a powerful swooshing noise knocks the Trents, and the police officers in the cemetery, to the ground. Inspector Clay is murdered by the ghoul and her husband's now-reanimated corpse. Lieutenant Harper says: "But one thing's sure. Inspector Clay is dead, murdered, and somebody's responsible!". Newspaper headlines report flying saucer sightings over Hollywood Boulevard, and three of them fly across Los Angeles. In Washington, D.C., the military fires missiles at several saucers. Chief of saucer operations Thomas Edwards says the government has been covering up saucer attacks. The aliens return to their Space Station 7, and Commander Eros tells the alien ruler that he has been unsuccessful in contacting Earth's governments. Eros recommends "Plan 9", the resurrection of recently deceased humans. Concerned about Paula's safety, Jeff urges her to stay with her mother while he's at work, but she refuses. That night, the undead old man breaks into their house and chases Paula outside, where the female ghoul and Inspector Clay join him. Paula escapes, collapsing in the woods while the three ghouls return to Eros in the saucer. At the Pentagon, General Roberts tells Edwards that aliens have been telling the government that they are trying to prevent humanity from destroying the universe. Roberts sends Edwards to San Fernando, where most of the alien activity has occurred. The zombified Inspector Clay goes berserk and attacks Eros, nearly killing him. The ruler approves Eros's Plan 9 to raise armies of the dead to march on Earth's capitals. Edwards and the police interview the Trents, unaware that the flying saucer has returned to the cemetery. Officer Kelton encounters the old man, who chases him into the Trents' backyard. Eros's long-distance ray strikes the old man, reducing him to a skeleton. Edwards, the Trents, and the police drive to the cemetery. Harper insists on leaving Paula in the car; Kelton stays with her. Eros and Tanna (his fellow female alien) send Clay to kidnap Paula and lure the other three humans to the saucer. Seeing its glow, Jeff and the police approach it. Clay knocks Kelton unconscious and carries Paula into the woods. Eros lets Jeff and the police enter the saucer with pistols drawn. He tells them that human weapons development will lead to the discovery of the "solaronite" bomb, a substance that explodes sunlight particles. Such an explosion would set off an uncontrollable chain reaction, destroying the universe. Eros believes that humans are immature and stupid; he intends to destroy humanity, threatening to kill Paula if Jeff and the police try to stop him. Kelton and Larry arrive and see Clay near the saucer carrying the unconscious Paula. They sneak up behind Clay and knock him out with a club. Eros says that Clay's controlling ray has been shut off, which released Paula. He and Jeff have a fistfight inside the ship, and the saucer's equipment is damaged and catches fire. The humans escape, and Tanna and Eros take off. The fire consumes the saucer, which explodes, and the two remaining zombies decompose into skeletons.

While California University of the Sciences Professor Douglas McCadden explores the tomb of the ancient Egyptian king Tutankhamun, an earthquake causes a wall in the tomb to collapse, revealing a hidden chamber. Inside, Douglas finds a mummy in a sarcophagus. Unbeknownst to Douglas, the "mummy" is not the body of a dead Egyptian, but an extraterrestrial alien in suspended animation, being wrapped up and buried alive thousands of years before and covered with a dormant green fungus. The body is brought back to California and Douglas has it examined by Dr. Ken Melrose and X-rayed by student Peter Sharpe before a big press conference about the discovery. While reviewing the X-rays, Peter notices there are five crystals around the "mummy's" head. Peter steals the crystals and makes new X-rays to cover up his theft. He sells four of the crystals to students who are unaware of their origin. The second set of X-rays overdose the body with radiation. This causes the fungus to re-activate and the alien to awaken from suspended animation. At the press conference the next day, one of the students touches the fungus on the sarcophagus, which eats away one of his fingers. The sarcophagus is then opened in front of the press to reveal that the mummy is gone. Ken and his colleague Dr. Hayworth attempt to identify the fungus and destroy it. At first, everyone assumes that the mummy's disappearance is because of a fraternity prank. However, University President Wendell Rossmore wants to pin the "theft" on Douglas, so that he can give the Egyptian department's directorship to his flunkie, Dr. Bruce Serrano. Meanwhile, the "mummy" tracks down the students who have the stolen crystals. The crystals are crucial components of an intergalactic transportation device that will allow the alien to return to its home planet. The alien violently reclaims its crystals, and, when he brutally attacks a female student, Lt. Plummer is called in to investigate the crime. As more students turn up dead or injured, Plummer believes that he is on the trail of a serial killer. While Plummer conducts his investigation, Douglas translates the hieroglyphic text from the sarcophagus. He hopes it will reveal the identity of the mummy. The text reveals that Tutankhamun found the alien in a coma-like state. Thinking that the unconscious alien was a god, Tutankhamun and his attendants touched it and were killed by its infectious fungus. The king and the alien were then buried together in the king's tomb. Douglas, having figured out that the "mummy" is an alien, makes the connection between the alien and the crystals. He then traces the stolen crystals back to Peter, who admits to the theft and gives Douglas the one crystal he kept for himself. In the end, Douglas, Wendall, Bruce, two students, a security guard and the alien all end up in a boiler room where the alien has set up its transportation device. The alien activates the device by placing the last recovered crystal on it; his mummy wrappings disintegrate, revealing his true form. The security guard urged by Bruce shoots at the alien, but Douglas leaps in front of the alien to protect it. As Douglas lies injured, the alien takes his hand, and the two disappear. A single crystal is left where the alien stood. Bruce grabs the crystal, and the fungus begins to destroy his hand, as the film ends stating: "To Be Continued."

When a landfill is overfull, and pollution reaches its maximum, a monster is born. Made from garbage and bearing a resemblance to a giant humanoid fly in a gas mask, the Milpitas Monster has an uncontrollable desire to consume large quantities of garbage cans. Some high school students find out about the monster and attempt to destroy it.

Drake is a corrupt and greedy developer who is illegally dumping toxic waste into the mines around the small town of Clear Sky, causing mosquitoes to mutate into giant beasts that attack and kill anything, including humans. A lawman of the town sheriff, Roy Boone, and his reunited love Sarah Crosby, must put a stop to both the pollution and the bugs. The body counts keep rising, which causes the locals to feel that they have to move out of the city. Crosby and environmental inspector Gordon Perry try to find the origin of the waste, but certain people try to prevent them for doing so due to Drake's evil deeds, which involves some hitmen.

Under the project called Bio-com, the Earthtek Corporation has locked 6 scientists in a deep underground vault to study the effects of isolation. The experiment has been ongoing for almost two years. Unknown to everyone except one of the scientists, the fake isolation experiment hides Earthtek's real purpose: to use drug(s) to create super-soldiers. A creature escapes the lab and kills a mouse and the base's cat. The creature can take over the body of whatever it inhabits.

Years ago, a young boy named Christopher Robin met and befriended a group of anthropomorphic creatures— Owl, Rabbit, Eeyore, Tigger, Kanga, Roo, Piglet and Winnie-the-Pooh —in the Hundred Acre Wood. Not long after, Christopher had to leave them for college; with the coming of winter and its lack of food, the starved creatures ate Eeyore. Traumatised by their actions, the others developed a hatred towards humans, including Christopher because he left them, and returned to their feral instincts, vowing never to speak again. Five years later, Christopher, now an adult, returns to the Hundred Acre Wood, accompanied by his fiancée Mary, and finds the place deserted. At night, the couple are ambushed by Piglet, who strangles Mary to death with a chain, before he and Pooh drag Christopher into the woods. Some time later, university students Maria, Jessica, Alice, Zoe, Lara, and Tina rent a cabin in the Hundred Acre Wood, so Maria can move on from a traumatizing stalking experience. Tina, lost in the woods, is attacked by Pooh. She hides in a nearby garage, but Pooh finds her and grinds her into a woodchipper. Later, back in his treehouse, Pooh whips Christopher with Eeyore's tail and showers him with Mary's blood. As night falls, Pooh and Piglet ambush the cabin. Pooh runs Lara's head over with a car before Piglet kills Zoe with a sledgehammer. Maria and Jessica arrive, watching Alice being abducted. They follow Pooh and eventually rescue Alice. Afterwards, the trio break into Pooh's treehouse, freeing Christopher from his chains, and another captive, Charlene. She explains her plan to get revenge on Piglet, who mutilated her face. Charlene summons Piglet, but he mauls her to death after Pooh subdues her. Pooh chases Maria and Jessica into the woods, but Alice stays behind and ambushes Piglet. After Alice knocks Piglet unconscious with his sledgehammer, Pooh arrives and fatally impales her with a knife through her open mouth. On the road, Maria and Jessica seek help from a group of local men passing by, whom Pooh easily slaughters. Maria attempts to run Pooh over with their pick-up truck but crashes, blacking out. Upon awakening, she witnesses Pooh dragging Jessica away, then decapitating her. Christopher suddenly appears and crushes Pooh between the truck and his car. Pooh barely survives, frees himself, grabs Maria and holds her at knifepoint. Christopher pleads for Pooh to release her, promising to stay with him forever. Pooh breaks his vow of silence by telling Christopher, "You left," then slashes Maria's throat. Seeing that his former friend is now beyond help, Christopher flees the woods as Pooh repeatedly stabs Maria's corpse in anger.

Rod is a young software salesman living a successful life in Silicon Valley. He meets up with old classmate and aspiring fashion model Nathalie and begins dating her. Things go well for the couple, with Rod receiving a large bonus that he uses to start his own business, while Nathalie is chosen as a Victoria's Secret model. As they grow closer, the couple remains oblivious to signs of something going wrong around them, such as unexplained wildfires and the carcasses of diseased birds turning up on beaches. After having a romantic time and kissing in a motel, Rod and Nathalie wake up to find that their town is under attack from eagles and vultures. The birds spit acid and explode into flames upon striking the ground (having become mutated and toxic due to global warming). Rod and Nathalie escape from the motel by joining up with an ex- Marine named Ramsey and his girlfriend Becky. As they leave town, they rescue two young children, Susan and Tony, whose parents have been killed by the birds. The group proceeds to drive from one town to the next, fending off more bird attacks along the way and briefly meeting a scientist named Dr. Jones studying the phenomenon. Becky is killed by the birds. Ramsey tries to save a busload of tourists. As they leave the bus, Ramsey and the tourists are killed by acid that is dropped by the birds. Nathalie stops Rod from attempting to rescue Ramsey because she fears the birds will kill him, too. The group then continue to a gas station. The children purchase candies and Rod begrudgingly agrees to purchase gas for $100 a gallon. They then continue, running into a man who presumably needs help. This man, unnamed, then robs Rod for gas at gunpoint. As the robber slowly backs away from Rod, a bird suddenly slits his throat and he succumbs to his wounds on the side of the road. Rod, Nathalie, and the kids then continue to flee from the birds, driving into a forest where they briefly meet a " tree hugger " named Tom Hill, who talks to them about the dangers of global warming. After escaping a forest fire, the quartet ultimately settles on a small beach, where Rod fishes for dinner. As they prepare to eat, they are attacked by the birds, but then doves appear and all the birds leave in peace. The film ends as Rod, Nathalie, and the kids watch the birds fly off into the horizon.

While on vacation near El Paso, Texas, Michael, Margaret, their young daughter Debbie, and their dog, Peppy, drive through the desert in search of the Valley Lodge. Margaret insists they are lost, and Michael claims they are not. They are stopped by a local deputy for a broken taillight, and released because Michael asks him for mercy on their "first vacation". After driving through farmland and the desert, the family reaches a house. The satyr -like Torgo is caretaker "while the Master is away". Michael and Margaret ask Torgo for directions to the Valley Lodge, which Torgo denies knowing. Frustrated, Michael asks Torgo to let him and his family stay the night, despite objections from both Torgo and Margaret. Inside the house, Michael and Margaret find a painting of the Master and a dog with glowing eyes. A howl frightens Margaret; Peppy breaks away from Debbie and runs outside. Michael investigates with a flashlight and revolver from his car and finds Peppy lying dead on the ground. Michael buries the dog in the desert and returns to the house. Meanwhile, Torgo reveals his attraction to Margaret and wants to keep her, defying the Master's desire to marry her. Margaret threatens to tell Michael of Torgo's advances. However, Torgo convinces Margaret not to say anything by promising to protect her. Michael cannot start the car. Torgo tells them there is no phone in the house, so the family decides to stay the night. Torgo secretly watches Margaret changing her clothes. Michael and Margaret find Debbie is gone and start looking for her, going outside and shouting Debbie’s name. Debbie returns, holding the leash of the dog from the painting. Following Debbie, Michael and Margaret stumble upon the Master and his wives, sleeping around a blazing fire. The wives are dressed in nightgowns, the Master in a robe with two red hands on it. Margaret and Debbie run back to the house to get their things and escape. As Michael runs behind them, Torgo uses a stick to knock him out and then ties him to a pole. The Master awakens and summons his wives, announcing that Michael must be sacrificed to the deity Manos, and that Margaret and Debbie will become his new wives. He leaves. The wives argue with each other about whether Debbie should become one of them or also be sacrificed. This turns into a catfight, where the wives tumble around in the dirt. The Master returns, breaks up the fight and decides to sacrifice Torgo and his first wife instead. Meanwhile, Michael wakes up, unties himself and returns to the house to collect Margaret and Debbie. The family runs off into the desert to escape. The Master summons Torgo and hypnotizes him, ordering the wives to kill him. Two of the wives attack Torgo with their hands, causing him to fall to the ground, seemingly dead. However, he later regains consciousness and stands up. The Master severs and burns Torgo's left hand. Torgo runs off into the darkness with his stump of a wrist in flames, and the Master sacrifices his first wife. As Michael, Margaret and Debbie run through the desert, Margaret falls and says she cannot go any farther. A rattlesnake appears and Michael shoots it, the noise attracting the attention of the deputies, who assume the noises came from Mexico due to the large desert echoes and leave it at that. Margaret convinces Michael to return to the house, as the cult would never think to look for them there. They go back and find the Master and his dog waiting for them. The Master steps towards them, and Michael fires his gun in shock, to no effect. Some time later, two women starting their vacation drive through a rainstorm, searching for shelter. When they find the Master's house, the entranced Michael greets them, saying "I am Michael, I take care of the place while The Master is away." Margaret and Debbie have become wives of the Master, and all are asleep.