The Ghostmaster shows up, and is about to get mugged by three punks, but he throws them into a dumpster with his supernatural bubbles. He then sends out a bolt which strikes the firehouse. The next morning, Slimer finds that his alarm clock isn't working (so he overslept) and when he goes to brush his teeth, the light and faucets don't work either. As he leaves, they start working again, and he goes to the rec room to watch TV, but the TV doesn't work either. He leaves, making the television turn on, then he wakes up the guys to tell them that "everything is broken".
Egon and Winston check the containment unit and find that it's working, but starts to malfunction if they approach it, yet repairs itself when they walk away. Ecto-1, the proton packs, and the phone aren't working either, so Peter goes out to look for a payphone, but the vehicles outside stop working too. Then, the TV turns back on, and the Ghostmaster appears, admitting that he put a curse on the Ghostbusters and Slimer and that's why things near them break. He then adds that he plans to take them to the Netherworld and make them his servants.
The Ghostbusters leave, as the Ghostmaster sends bubbles into the firehouse. The Ghostbusters hide in a bike shop and then dash past the Ghostmaster on roller skates (Peter and Winston) and bikes (Egon and Ray). They split off into pairs, and the Ghostmaster chases after Peter and Winston, allowing Egon and Ray time to research the situation. Slimer slimes the Ghostmaster, allowing Peter and Winston to get away. Slimer then learns that the Ghostmaster is starting to lose his powers, but that one of the bubbles is flying towards Ray and Egon.
Egon and Ray read books they took out from the library, and they determine that the curse works like a force field and only works within a 40-foot radius. They also determine that if they could only trap the Ghostmaster, the curse would vanish, but that he's too powerful to trap. Slimer tells them about the Ghostmaster's powers weakening, which gives Ray an idea.
Peter and Winston get trapped in bubbles, which arrive at the library. Egon and Ray then trigger a makeshift device that leads the Ghostmaster to be trapped. This gets rid of the curse and the bubbles, then the guys go home. At home, the electricity cuts out, which they think is the Ghostmaster returning, but it turns out that Peter simply forgot to pay the electric bill.
This episode provides examples of
- Badass in Distress: Peter and Winston end up trapped in bubbles.
- Big "NO!": The Ghostmaster yells, "NO!" as he's being trapped.
- Bullying a Dragon: The three punks try to mug the Ghostmaster, who immediately throws them into the trash.
- Covered in Gunge: Invoked when Slimer distracts the Ghostmaster by spraying him with ectoplasm.
- Curse: The Ghostmaster curses the Ghostbusters and Slimer so that everything within a 40-foot radius of them breaks down.
- Did You Just Punch Out Cthulhu?: Downplayed — the Ghostbusters manage to trap the Ghostmaster, who's said to be a very powerful ghost, however he was said to be weakening.
- Diegetic Soundtrack Usage: At the beginning, Slimer hums the theme song.
- Distressed Dude: Peter and Winston end up trapped in bubbles.
- Ectoplasm: Exploited — Slimer slimes the Ghostmaster to distract him from chasing Winston and Peter.
- Evil Gloating: The Ghostmaster appears on the TV just to gloat about how he made the Ghostbusters powerless and wants to enslave them.
- Evil Laugh: The Ghostmaster gives loud, sinister chuckles whenever he talks to the Ghostbusters about his plans.
- Food End: In the ending scene, Ray and Slimer are eating popcorn.
- "I Can't Look!" Gesture: Slimer covers his eyes as the Ghostmaster appears.
- Last-Second Joke Problem: The Ghostmaster is trapped, and so the Ghostbusters and Slimer are no longer hexed... but the power is out due to Peter's forgetting to pay the bill.
- Let's Split Up, Gang!: The Ghostbusters split into pairs (Peter with Winston and Ray with Egon) to distract the Ghostmaster.
- Mythology Gag: Peter calls Slimer by his "spud" nickname from the movie.
- Narrative Shapeshifting: Slimer grows ears like the Ghostmaster's when telling Egon and Ray that his powers are dwindling.
- No Inner Fourth Wall: Played for Horror — the Ghostmaster threatens and gloats to the Ghostbusters and Slimer through a television.
- Oh, Crap!: Slimer looks nervous when he sees the Ghostmaster, then when he learns a bubble is headed for Ray and Egon.
- Revenge: The "revenge" part of the title comes from the Ghostmaster wanting to get back at the Ghostbusters for trapping so many of his underlings.
- Rube Goldberg Device: Due to not being able to use electricity or pipes, the Ghostbusters lead the Ghostmaster to the trap with a device strung together from random objects.
- Shock-and-Switch Ending: The Ghostmaster is seemingly trapped... until the power shuts down again... except, he was trapped; the power just turned off normally due to Peter not paying the bill.
- Slapstick: The Ghostmaster gets thrown into some garbage.
- Speak in Unison: All the Ghostbusters say, "It's the Ghostmaster!" in unison when he appears on TV.
- Terms of Endangerment: Ray and Slimer insult the Ghostmaster with "pal".
- Theme Music Power-Up: The theme tune plays as the Ghostmaster is trapped.
- Tongue-Out Insult: After sliming the Ghostmaster, Slimer waggles his tongue at him.
- Worf Had the Flu: The only reason the Ghostmaster could be trapped was because his power was waning.
