Some workmen on the Eiffel Tower are tired, so one of them goes to nap in the Pavilion, despite it being forbidden due to being the workshop of the tower's creator, Monsieur Eiffel. He accidentally knocks a clock onto a control box, breaking some lamps and making the tower shake, but he decides he'll replace the lamps the next day. On a lower deck, some tourists get frightened by ghosts, and another workman gets kidnapped by one.
A Frenchman named Lucien arrives at the firehouse and begs the Ghostbusters to catch the ghosts by the Eiffel Tower. Ray isn't so sure since he has a satellite dish to install, but the rest of them convince him to take the job. When they get to Paris, they dilly-dally a bit by sightseeing but insist it's research. When they eventually get to the tower, they have to take the stairs as the electricity is cut.
Egon scans the area, but doesn't get any PKE readings, yet a lot of ghosts still show up. He radios Lucien and asks him to turn the power back on so they can use the elevator, where they try to blast at the ghosts, but the girders absorb the proton streams. Several ghosts attack the switchboard, so Winston climbs up and stops them. Egon "reverses the polarity" of the proton packs, allowing them to suck the ghosts into the girders.
When the Ghostbusters reach the Pavilion, Egon reads Eiffel's diary and finds out that he was essentially a Ghostbuster back in the day, and the tower is where the ghosts were locked up, but they're escaping because the control box is broken and they have twelve hours to fix it before the damage becomes irreparable and all of the ghosts (of which there are millions) escape.
Ray suggests that Egon link his proton pack to the control box to re-trap the ghosts who have already escaped, which he does and it works. The Ghostbusters then tell the government officials about the situation, and they reveal that some of Eiffel's papers are around. Egon studies the control box, while the rest look for the papers, with ghosts chasing them. Ray arrives at the Louvre, where he's attacked by several possessed exhibits, and Winston arrives at the Notre Dame, where possessed gargoyles steal the journal, but after a fight, he gets it.
The next morning, the workmen connect some powerlines from the tower's generator to a console. Then, Egon is about to connect it to the control box, but a ghost destroys it. However, Ray hooks the proton packs to the control box and zaps the broadcasting antennas, zapping the ghosts into the firehouse's containment unit. It works, but the ghosts end up on the French televisions for five hours, meaning the Ghostbusters have to pay when the cable company sues.
This episode provides examples of
- Animate Inanimate Object: Some ghosts possess artworks and make them come alive.
- Artistic License – History: Done intentionally with the Eiffel tower being made to imprison ghosts — it was actually made as part of a world fair.
- Buffy Speak: Peter calls the control box the "whatchamacallit".
- Dead All Along: At one point, a man is seen, who then turns out to be a ghost.
- Distressed Dude: One of the Louvre ghosts grabs a man.
- Elevator Failure: Defied — some ghosts try to cut the cord to the elevator, but Winston stops them.
- "Eureka!" Moment: Ray came up with his plan involving the satellite from Peter making an offhand comment relating to TV.
- Evil Laugh: The ghosts who scare the tourists laugh maniacally.
- Gasp!: Egon gasps when he first encounters the Eiffel tower ghosts.
- Gratuitous French: The only French word the Frenchmen actually say is "monsieur".
- Jacob Marley Apparel: Implied when one ghost is seen in old-fashioned clothes.
- Just a Stupid Accent: The Frenchmen speak English (even among themselves) but with a heavy French accent.
- Long List: At the end, Winston lists a long, rambling list of sports that are shown on TV.
- Loud Gulp: Peter gulps twice during the stair climb, then Ray gulps when meeting the Louvre ghosts.
- Mythology Gag: Peter is the one who complains the most about having to take the stairs. This references how in the first movie, when they're all climbing the stairs in the apartment building, he complains that he will throw up when he reaches the top.
- Nightmare Face: Two ghosts scare tourists by making their faces melt and their eyes bulge out.
- No-Sell: The Eiffel tower's suction mechanisms prevent the ghosts from being hit by the proton packs.
- Oh, Crap!: Egon freezes up when he first sees the ghosts on the stairs, then again when he finds out there are ghosts leaking out of the tower.
- Poirot Speak: The Frenchmen mainly speak English, but call other men "monsieur".
- Race Against the Clock: The Ghostbusters have only twelve hours to fix the Eiffel tower's containment system.
- Red Eyes, Take Warning: Some of the ghosts have red eyes.
- Sealed Evil in a Can: The ghosts were trapped within the Eiffel tower before the box broke.
- Simple Solution Won't Work: Subverted — Peter wonders why they don't just turn the power back on, but Egon says it's a safety protocol... however, the then gets them to turn it back on anyway.
- Slapstick: At one point, Peter crashes into another guy.
- Vacation Episode: Zigzagged — the Ghostbusters' trip to Paris is not a vacation, but they do a bit of sightseeing anyway.
- Voluntary Shapeshifting: The tourists are scared by some ghosts who morph from human form into more goulish forms.
