The Ghostbusters are hired as consultants for a horror movie titled Horror House. They arrive on the set, which is a house that's genuinely haunted that was chosen for authenticity, and meet three guys named Gil Hamstrung (an actor), Feeny Muscleberg (a director), and Artie Grendel (the producer). Grendel then fires the Ghostbusters, and then when the ghosts who reside in the house start wreaking havoc because they don't like the script (since the script concerns ghosts losing) he starts filming them. The Ghostbusters trap most of them, but Grendel helps three of them get away.
A month later, the Ghostbusters go to the premiere of Horror House and Grendel pays them to appear for publicity. The Ghostbusters talk to Gil and Feeny, who were also fired, and are surprised the movie was made so quickly. They then become suspicious when Gil drives the guys away for a tour of MJN Studios.
The Ghostbusters then enter MJN studios, only to be caught in a net. Grendel reveals that he hired the three ghosts to help him make movies in exchange for them making their own movie called The End of the Ghostbusters, then throws the Ghostbusters in prison. The Ghostbusters then get chased all over the set by the ghosts, who are now holding proton packs.
Gil and Feeny show up in a helicopter and try to save them, but the ghosts shoot them down and capture them. Joe, the leader of the ghosts, promises to let them go if the Ghostbusters give up, so they do, but they break their promise and tie the Ghostbusters up alongside Gil and Feeny. Ray then grabs a PKE meter from Egon and reverses it to summon the ghosts of three MJN Studios actors, who untie everyone. Then, the Ghostbusters trap the bad ghosts, Ray and Winston tie up Grendel, and the actor ghosts go off into the distance.
This episode provides examples of
- Actor/Role Confusion: While Ray was right about the actor ghosts being on their side, he claims it's because they're "heroes", seemingly forgetting that there's a difference between a hero and someone who simply plays one.
- Alliterative Title: In-Universe; the movie is called Horror House.
- All Part of the Show: Grendel thinks the ghosts are acting when they start haunting the set.
- Badass in Distress: The Ghostbusters get thrown in prison and chased around by ghosts holding proton packs.
- Bait-and-Switch: At one point, it seems like there's a ghost in the movie, but it turns out to be Gil in costume.
- Cyclops: One of the background ghosts has one eye.
- Distressed Dude: The Ghostbusters, along with two other men, get tied up and threatened with death.
- Evil Laugh: The bad ghosts laugh maniacally when Grendel reveals they're working for him.
- Extra Eyes: Some of the background ghosts have lots of eyes.
- Friendly Ghost: The actor ghosts untie the Ghostbusters, Gil, and Feeny.
- Gratuitous Spanish: Winston calls Ray "amigo" at one point.
- Green and Mean: Some of the evil background ghosts are green.
- Haunted House: The house where Horror House is filmed at is haunted by a group of ghosts who cause mayhem just because they don't like the script.
- Hoist by His Own Petard: The ghosts use the Ghostbusters' proton packs against them.
- Implied Death Threat: The movie the ghosts want to make is titled The End of the Ghostbusters.
- Oh, Crap!: Winston makes a worried noise when the ghosts appear with proton packs.
- Red Eyes, Take Warning: Some of the background ghosts have red eyes, and they terrorise the humans.
- Suddenly Shouting: When Ray says that being in MJN Studios was what he'd always dreamed of, and then the guys get caught in a net, Peter says, "If you've always dreamed of this moment, WHY DIDN'T YOU LET US KNOW!?".
- Tempting Fate: Ray says he's always dreamed of being in MJN Studios, right before he and the others are caught in a net.
- Terms of Endangerment: Peter insults Grendel by calling him "pal".
