The president of Civic TV Channel 83, Max Renn, is always looking for new cheap and erotic movies for his station. When his employee, Harlan, decodes a pirate video broadcast showing torture, murder, and mutilation called "Videodrome," Max becomes obsessed to get this series for his channel. He contacts his supplier, Masha, and asks her to find the party responsible for the transmission. A couple of days later, Masha tells that "Videodrome" is real snuff movies. Max's sado-masochistic girlfriend Nicki Brand decides to travel to Pittsburgh, where the show is based, to audition. Max investigates further, and through a video by the media prophet Brian O'Blivion, he learns that that TV screens are the retina of the mind's eye, being part of the brain, and "Videodrome" transmissions create a brain tumor in the viewer, changing the reality through video hallucination.
Torok is an ancient troll, and he is using the body of Wendy Anne to disguise himself, in order to take over an apartment building. Wendy's newly moved family is just settling in, and while her parents suspect nothing, her brother Harry notices a change in her behavior instantly. Using an emerald ring, Torok transforms the residents into plant pods and plans to restore his old world in which he once lived in many years ago. We soon discover Torok is the ex-husband of Eunice St. Clair, a resident in the building who was married to Torok long ago before he became his transformed self.
After several people in the New Mexico desert wind up missing or dead, including an F.B.I. agent and most of his family, police Sgt. Ben Peterson teams up with F.B.I. agent Bob Graham to find out what's causing the strange occurrences. They find send a strange print found at one of the crime scenes and it is sent to the Department of Agriculture. Doctor Harold Medford and his daughter Doctor Patricia Medford arrive and ask to be taken to the scene of some of the disappearances. When they get there they are shocked to find gigantic ants, whose mutations were caused by the first atomic bomb explosion nine years earlier. They manage to destroy the nest of ants, but not before two winged queen ants and a couple of drones have hatched and escaped the nest. Now it is a race against time to find the two queen ants before they can establish more nests and hatch more queens.
Brought back from his dead mouldering remains with blood drooled on them by one of the bats he commands, Count Dracula once again spreads his evil from his mountaintop castle. When libertine Paul Carlson disappears one night, his more sober brother Simon and his girlfriend trace him to the area, discovering a terrified populace. Thrown out of the inn, they make their way, like Paul before them, towards the sinister castle and its undead host.
During World War 2, a small plane off the south coast of America is low on fuel and blown off course by a storm. Guided by a faint radio signal, they crashland on an island. The passenger, his manservant and the pilot take refuge in a mansion owned by a doctor. The easily-spooked manservant soon becomes convinced the mansion is haunted by zombies and ghosts. Exploring, the 3 find a voodoo ritual in the cellar, where the doctor is trying to acquire war intelligence by transferring personalities into his zombies. But the interruption causes the zombies to turn on their creator.