The Ghostbusters and Slimer are after a ghost in a museum. They eventually catch it, but Ray and Winston feel guilty due to having found the ghost cute. When they return to the firehouse, Slimer is afraid of Janine's mud mask and flies past Ray, who's startled into dropping the trap, freeing the ghost. They then decide to keep the ghost, with Janine naming him Victor after her nephew.
Later, Victor starts playing with some of Egon's laboratory equipment. Slimer chases him away, but then the machine starts frying him, and when Egon enters and turns it off, he thinks Slimer had been playing with it. Victor then eats the last jelly doughnut, and Janine thinks Slimer did it and yells at him. Then, when Ray is working on Ecto-1, Victor slams the hood on him, and again Slimer gets the blame. He angrily chases Victor and starts choking him, but Egon catches him and scolds both ghosts. Slimer then sees Victor change into a monstrous form and tries to fly away, but Victor grabs him and traps him. He morphs back into his smaller form, and Egon and Peter take him to study.
At dinner, the Ghostbusters get called to Tribecca for a poltergeist, while Janine spots the trap Slimer is in and thinks the Ghostbusters just forgot to empty a trap. In Tribecca, a woman thinks there's a poltergeist in her house, but it turns out to just be a subway train shaking it.
Janine drops the trap, ready to empty it, releasing Slimer, who explains about Victor. Janine calls the guys, who have Victor with them, and he flies out of the car. They chase after him, while Janine and Slimer go to search for them in Ecto-2. In an alley, Victor turns into his monstrous form, destroys the proton packs, and grabs the guys. He's about to kill them, when Janine and Slimer show up, and toss them spare proton packs, allowing them to trap Victor. They then return to the firehouse and grovel to Slimer to apologise for wrongly blaming him.
This episode provides examples of
- Admiring the Abomination: Before they find out that Victor is evil, Ray, Winston, and Janine find him adorable.
- Baby Talk: Ray talks to Slimer in a baby voice at the museum.
- Badass in Distress: Victor destroys the Ghostbusters packs and tries to kill them.
- Beware of Vicious Dog: The lady owns a snarling dog who Peter jokingly calls a terror dog.
- Big Anime Eyes: Victor's "cute" form has large, anime-like eyes.
- Captain Obvious: When Egon says that they're helpless without their proton packs, Peter says, "I was well aware of that, Egon!".
- A Day in the Limelight: This episode focuses on Slimer.
- Death Glare: Slimer glares at Victor for getting him in trouble.
- Did You Just Flip Off Cthulhu?: Peter insults Victor before opening fire on him.
- Distressed Dude:
- Victor traps Slimer.
- Later, he destroys the Ghostbusters' proton packs and tries to kill them.
- Dog Stereotype: The lady's vicious dog is a Doberman.
- Dramatic Irony: While Slimer finds out that Victor is evil at the same time as the audience, the humans don't learn until later.
- Gasp!: The Ghostbusters do a dramatic gasp when they see Victor's monstrous form for the first time.
- Evil All Along: About halfway through the episode, Victor is revealed to be evil.
- Evil Is Petty: In addition to trying to kill the Ghostbusters, Victor also does petty evil acts like eating the last donut and slamming the car hood on Ray.
- Evil Laugh: Victor laughs evilly twice while chasing the Ghostbusters.
- Evil Sounds Deep: In his monstrous form, Victor babbles in a deep voice.
- Face of an Angel, Mind of a Demon: Zigzagged — Victor is always evil, but being a shapeshifter, he sometimes looks cute and sometimes looks appropriately scary.
- Facepalm: Slimer facepalms after Janine thinks he ate the donut.
- Fear Is the Appropriate Response: Egon says that the best thing to do is run away once Victor destroys the proton packs.
- Food End: The episode ends with Slimer being fed.
- Friendly Ghost: Subverted for Victor — he seemed friendly, but it turned out he was evil.
- Ghastly Ghost: Downplayed for Victor's monstrous form — it's a little ugly with sharp claws, jagged teeth, and big muscles, but not as ugly as other ghosts in the series.
- Haunted House: Subverted for the woman's house, which she thinks is haunted, but it's only a train shaking the walls.
- Jealous Pet: Slimer is sulky about the guys adopting a second pet ghost, even before Victor does any wrong.
- Manchild: Slimer's childish nature is lampshaded by Egon, who complains, "Some ghosts never grow up!".
- Mass "Oh, Crap!":
- The Ghostbusters gasp dramatically when they see Victor's monstrous form.
- Then, they all gape in fear when he goes to kill them.
- Not Me This Time: Janine thinks Slimer ate the doughnut even though it was actually Victor, but it's a reasonable presumption since Slimer is known for stealing food.
- Not So Stoic: Egon yells, "RUN!" at one point.
- Platonic Kissing: Slimer kisses Janine after being freed.
- Possession Presumes Guilt: Egon sees Slimer with the machine and assumes he'd been playing with it, but actually it was Victor.
- Race-Name Basis: Before Victor is named, Peter calls him "ghost".
- Right for the Wrong Reasons: Egon sees Slimer choking Victor and thinks Slimer is jealous of Victor. He is, but in that particular instance, it was because Victor got him in trouble.
- Running on All Fours: In his monstrous form, Victor goes down on all fours to run.
- Say My Name: Slimer shouts, "RAY!" when Victor slams Ecto-1's hood on Ray.
- Scary Teeth: In his monstrous form, Victor has large, jagged teeth.
- Shout-Out: The episode title puns on Casper the Friendly Ghost.
- Slapstick:
- At the museum, Peter is knocked over by Slimer.
- Later, Janine coughs after getting exhaust fumes in her face.
- Suddenly Shouting: Egon says, "I have a plan: RUN!".
- Sweet Tooth: Victor eats a donut which Janine wanted.
- Troublemaking New Pet: After the Ghostbusters adopt Victor, he plays with Egon's laboratory equipment, eats the last donut, and slams Ecto-1's hood on Ray, prompting Egon, Janine, and Ray respectively to think Slimer did it.
- The Unintelligible: Victor mainly speaks gibberish (except for one instance where he said, "Uh-oh").
- Unsuccessful Pet Adoption: Played for Horror — the Ghostbusters get a second pet ghost, who they have to give up... because he was homicidal.
- Voluntary Shapeshifting: Victor can morph between a cute form and a monster form.
- We Named the Monkey "Jack": Janine names Victor after her nephew.
