Struggling
Seattle plumbing salesman, former fencing athlete and couch potato Roy Knable lives with his neglected wife Helen. After a fight (which involves Helen smashing the family's television with one of Roy's fencing trophies as a wake-up call to reality), salesman Mr. Spike appears at the couple's door, offering them a high-tech
satellite dish system filled with
666 channels of programs one cannot view on regular television. After discovering the TV set, Helen starts planning to
divorce. Unbeknownst to Roy, Spike is an emissary from
hell who wants to boost the influx of souls by arranging for TV junkies to be killed in gruesome and ironic situations. The 'candidates' are sucked into Hellvision, a hellish world where they must survive demonic satirical versions of sitcoms and movies. If they can survive for 24 hours, they are free to go, but if they get killed, then their souls will become the property of
Satan. Roy and Helen are sucked into Hellvision and are put through a hellish game show, wrestling match, and the comedy-drama
"Northern Overexposure", in which they meet Crowley, an exiled former co-worker of Spike's. Through tenacity, improvisation, and luck, the Knables stay alive and escape into different channels through portals hidden within the shows and movies. While watching the TV, their young son Darryl recognizes his parents fighting for their lives as animated mice in a cartoon in which a robotic cat pursues them, after which they become separated. Roy appears in the
"Saturday Night Dead" segment ''"Duane's Underworld"
, featuring the titular characters as zombies, in which he is nearly burned to death with hot pokers. Roy eventually finds Helen in a black-and-white gangster movie, and the two escape into "Off With His Head"'', a miniseries about the
French Revolution in which Roy is captured and nearly beheaded. Darryl, a tech geek, uses radio equipment to patch into the miniseries and convince the characters he is
God, demanding they let his parents go, which infuriates Spike. Roy's 24 hours are up at this point, but since he was the only one who signed the contract, this activates a loophole wherein Spike can make Helen remain in Hellvision. Spike enters Hellvision and kidnaps Helen, changing channels again. She finds herself tied to a cart stacked with dynamite sitting across a railway track in a
Western movie, with Spike announcing that the
3:10 to Yuma is due soon. Spike informs Roy and his kids - watching from their home - that Helen is being held captive on Channel One, in an attempt to lure Roy. Roy goes back in and has a gunfight with Spike, wherein he is shot, but the bullet is stopped by Roy's remote control. He and Spike then fight over the latter's remote and this causes the two to be zapped through more demonic and twisted parodies, a violent
ice hockey game, a
crash test dummy demonstration, and an episode of ''
Three's Company''. Roy eventually confronts Spike in a medieval
swashbuckling movie, and they have a fencing match. They then get zapped into a music video, where Roy gets hold of Spike's remote and sends him back to the swashbuckling movie. Returning to Channel One, Roy tries to save Helen by changing channels, only to find that the demonic production team at Hellvision have locked out all inter-channel escape options. Roy and Helen eventually realize they can still escape by turning the remote off. Roy and Helen arrive back in their garden. Their neighbor's
Rottweiler appears about to attack, but ends up getting sucked into the dish just before it destroys itself. Spike gets eliminated by the Rottweiler on the command of Crowley, and is then succeeded in his executive position by Pierce, a younger upstart intern. Roy cuts back on his TV viewing, quits his job as a plumbing salesman, and opens his own fencing school, in which he advises a student that watching too much TV can get you into trouble. ==Cast==