This flashback story reveals the origins of how and why Slimer came to live with the Ghostbusters, in events immediately following their film encounter with Gozer.

A young man hurt by the woman he loves decides that there is far too much pain in the world and, aided by his loyal yet reluctant companion, sets about a chain of events that will bring Ragnarok, the end of the world!

Zapped back in time to 1837 England, the Ghostbusters unknowingly trap the ghosts of Christmas, thereby saving Ebenezer Scrooge from his scheduled rehabilitation. The future is changed, and they must go back in time to change it back, while Egon makes an even more frightening trip... into the Containment Unit!

The Ghostbusters release the Stay Puft Marshmallow Man from the containment unit to shoot a commercial in exchange for getting $50,000 for a children's hospital. However, during the process of letting Stay Puft out, a vicious manta ray-like phantom escapes in order to seek revenge against the Ghostbusters.

Two children turn up at the firehouse claiming that the Boogieman is living in their closet, leading the skeptical Ghostbusters on a mission to bedroom closets throughout New York, and finally into the twisted world of the Boogieman himself.

The Sandman decides that humanity might stop its warring and fighting if it had a five-hundered-year-long nap, but his sleep dust causes dreams to come to life, creating havoc for the Ghostbusters!

When ancient ruins arrive in New York for examination, the evil spirit of Samhain is released! He declares that Halloween should last forever and calls forth an army of the night!

The Ghostbusters discover a real goblin in an otherwise fake carnival sideshow, but even though they suspect it has been wreaking havoc in several towns, they are prevented from capturing it.

Charles Foster Hearse III, millionaire publisher of the Spooks Illustrated, challenges the Ghostbusters to a friendly competition to find out which one of them deserves to be on the cover of the next issue as "Ghost Hunter of the Year".

Ray and Winston are talked into going on a game show by Peter, who wants the price: a holiday to Tahiti. But the show is a front for something a lot more sinister and life threatening!

The Ghostbusters are flown out to Hollywood to oversee production of a movie being made about their story. On a tour of the studio they are called into action, but they're armed with fake Proton Packs by mistake!

During a skirmish at a chemical factory, the Ghostbusters are covered with a contaminated ectoplasmic chemical... and it changes them in creepy ways!

The Ghostbusters are called to rid sweet old Mrs. Roger's house of ghosts, the Granny isn't what she seems, and Janine could be facing a demon in the headquarters... alone!

After ruining Winston's birthday surprise, Slimer leaves the firehouse for good and wanders the streets of New York... where he soon joins in with a bad crowd of poltergeists!

Private eye Phillip Spade is surprised to find himself awake, in ghost form, after being dead for so many years. He soon realizes that he is back to solve a case that he failed to resolve while alive, now aided by four strange guys in funny jumpsuits.

Walt Fleischman, foremost cartoonist of the 1940s, has been missing for over thirty years, but strange sounds coming from his studio prompt the Ghostbusters into action. Will the Ghostbusters become cartoon characters?

A descendant of Ichabod Crane is, as his predecessors, tormented by the frequent appearances of the Headless Horseman, who attacks anyone that gets close to her. The Ghostbusters must help break the curse, but Peter's got troubles with the police!

A mysterious battle fought by the forces of good and evil is being waged within a baseball stadium. Winston is soon drafted to play on the side of good... within an individual's soul as the prize.

Mrs. Faversham has not gone up into her attic in over thirty years, not since her father imprisoned terrible forces within the attic. Now, driven nearly mad by the sounds above her, Mrs. Faversham turns to her only hope: the Ghostbusters.

Peter's father stumbles upon a strange artifact in the Artic; a block of black ice containing a fire demon that was captured ages ago. Unfortunately, he and phony psychic Doctor Bassingame later unleash the demon into New York City!

Subway workmen accidentally open a door that unleashes all of the evil from hell and it begins to spread across New York, primarily through the subway tunnels. This time, the Ghostbusters may not come back alive!

When Egon is accidentally zapped by one of his own inventions on a bust, he becomes, for all intents and purposes, a ghost. Can the Ghostbusters build a replacement before Egon fades into oblivion?

A troll who has grown tired of living under the Brooklyn Bridge runs away to the city in search of good times, but when his fellow trolls take control of the Brooklyn Bridge, the Ghostbusters come to the rescue.

With the city undergoing a massive surge in spectral activity the Ghostbusters have no time to take care of Janine's haunted apartment. Janine decides to tackle the job on her own… and may end up saving the day!

Necksa, lord and ruler of the sea elementals, strikes out at the air-breathers who have been polluting the oceans. When the Ghostbusters attempt to stop him, Egon, Ray and Winston are swallowed by the creature, leaving Peter to save the day.

Young Kenny fancies himself a Ghostbuster, and having been given a tour of the firehouse, tries to convince his friends that he is a member of the team. In an effort to prove himself, the boy enters a haunted house with one of Egon's latest inventions.

Egon and Janine stumble across a carnival with a roller coaster called the Ecto-1. Egon is less than pleased with the trademark infringement, but when the ride is taken over by actual ghosts, the ride's owner capitalizes on the event for publicity.

When the number of ghosts across the city drops considerably, the Ghostbusters realized that they will soon be broke! But after they prevent a robbery from taking place, they reinvent themselves as... the Crime Busters!

Long ago, Egon's ancestor Zedekiah Spengler summoned up a dragon to do his bidding. When Egon comes across the well in which the creature was put to sleep, he accidentally awakens the dragon, which assumes Egon is its father!

Calamari, a magician and escape-artist supreme, is being haunted by a ghost that cannot be captured in a Ghost Trap. To make matters worse, Peter has fallen through Calamari's secret cabinet into a strange dimension!

After a trio of ghosts escape from the Containment Unit, they decide to discredit the Ghostbusters by disguising themselves as “Ghosts Я Us,” a rival ghostbusting franchise!

A boy named Lee goes to the Ghostbusters for help when his brother, Alec, begins acting strangely and doing bad things. When the guys decide to investigate, Egon learns a Grundel is making Alec do bad things and if something is not done soon, he will mutate into one.

When the Necronomicon is stolen from the public library, the Ghostbusters find themselves fighting creatures in the sewers, chasing down cults, and researching comic books to help them in their mission.

When Ray returns home to a hero's welcome, someone wants to make him look bad in front of his hometown, his childhood heartthrob and the Ghostbusters.

A possessed geranium is given to the Ghostbusters as a gift, who in turn present it to Janine. The plant soon grows and begins to overthrow New York, but how do you "bust" a plant?

An unkind dying billionaire has a machine built to send his money and possessions to the other side, so that he'll have it after he dies. Unfortunately, the machine releases horrendous ghosts in exchange.

The power blackouts across New York are the work of a veritable army of ghosts, but the power drain leaves the Ghostbusters' Containment Unit vulnerable!

When Peter takes his date to the Cloisters in New York, warrior spirits spew forth from the tapestries with only one thing on their mind: taking Peter's date back into the tapestries with them, where she will remain forever.

Slimer has been pestering they guys too much and they finally snap at him. He sulks off to the attic, just as the Ghostbusters are called out on a mission. When a powerful ghost heads for the firehouse to destroy it, a despondent Slimer is the last line of defense!

When a ghost is caught and trapped in a steelyard by the Ghostbusters, it appears to have been vaporized. However the ghost merges with the steel which is cut and distributed throughout the city…. And now it wants to reassemble itself!

A year after the Ghostbusters defeated Vigo the Carpathian, a ghost named Poso kidnaps Janine and Louis to force the Ghostbusters to hand over their business. The Ghostbusters get help from a recently-captured ghost, Shifter, to find out why Poso wants their business and where to find him. Covered in mood slime, Peter goes to the Ghost Town to save Louis and Janine.

Simon Quegg, a selfish, insolent man, was cursed 100 years ago to never reach home, and is continually pursued by a terrible specter. When Ray is accidentally exchanged for Quegg, the Ghostbusters must try to break the curse!

The Ghostmaster is back and casts a spell on the Ghostbusters that causes all electronic equipment near them to shut off, including their proton packs and ghost traps.

A trio of ghosts abduct Slimer and will keep him unless the Ghostbusters agree to free a ghost named Spiderlegs.

Slimer breaks a trap and doesn't completely fix it before the guys use it on a job. Now the essence inside starts to leak out and make inanimate objects come to life.

The sinister Professor Dweeb captures Slimer by posing as an innocent ice cream vendor. By using his new invention, Dweeb intends to read Slimer's mind and discover a ghost's vulnerability. Helplessly trapped, Slimer can only watch as the evil Professor scans through his memories.

The Mean Green Teen Machine, three reptilian-like surfing ghosts, catch a wave into New York City in order to satisfy their unquenchable craving for pizza. After a day of battling the three ghosts, the Ghostbusters decide to test Egon's latest machine which can provide any desired dream... or nightmare!

The Ghostbusters get a temp (who turns out to be a ghost) and she decides Egon would make a great husband.

The firehouse is going to be torn down to make way for a new expressway, but that's the least of the Ghostbusters' problems. The guys and Slimer get sent back to 1959 due to a trap accident. They have to find a way back and fight ghosts without their equipment.

The Ghostbusters become involved in the world of knights and dragons to free a captured Janine.

Slimer finds a cat that can make all of his dreams come true.

Slimer wins the lottery, only to find his winnings have been cursed.

A New York garbage strike on the hottest day of the year prompts the appearance of Glob, who teams up with the misguided Professor Dweeb, to bust his baby brother Sleaze out of the Ghostbusters' Containment Unit!

The mysterious disappearance of all of the ghosts in a haunted Transylvanian town is threatening their tourism and economy. The Ghostbusters are called in to bring the ghosts back, but they meet an evil Count who wants to stop them.

A large horde of demons invades the city looking for a pair of scissors once owned by the mythical Three Fates. Now, the Ghostbusters find themselves in the depths of the netherworld, racing to stop the demons from controlling the lifespans of all mankind.

A family of ghosts on vacation work to remove those they believe are interrupting their peace and quiet, including Peter, Winston and Slimer.

When lightning hits the Ghostbusters' television antenna, Ray and Slimer's favorite animated character, Sammy K. Ferret, comes to life! The selfish and tricky toon plays classical cartoon pranks, but hides a sinister secret!

All of The Great Strazinski's assistants keep disappearing in the magician's new cabinet trick and the Ghostbusters are called in to figure out the creepy cabinet's mystery. Soon enough they are transported into the realm of Gorgar, a ghost craving knowledge from a true magician.

At an Eastside wrecking yard, a pit of toxic liquid waste has an evil effect on a long dormant Indian earth spirit. When polluted, the once benign spirit rises from it's sacred resting grounds and takes possession of the Ecto-1, causing the hearse to come alive!

Ray and Slimer have been in a joking mood lately, but things are about to get worse when a magical box is opened and releases two imps that like to play deadly practical jokes.

When the Ghostbusters visit Russia to lecture about ghostbusting, they are made scapegoats for the theft of the precious Nameless Book, a link to awakening a great evil.

A demon trapped inside an ancient cuckoo clock snatches Louis Tully's nephew, Lawrence, from his birthday party. The Ghostbusters come to the rescue, but Peter is sucked into a dimensional portal.

Count Vostok sends four Concorde tickets and requests that the Ghostbusters travel to Boldavia to rid his castle of a ghost. When the Ghostbusters arrive and are unable to locate a mirror, they begin to realize that things are not what they seem.

Winston is accepted to the National Space Program as a civilian expert in supernatural phenomena, but during his visit at the space station he comes across a class seven alien ghosts that is sucking the energy and atoms out of his fellow astronauts!

The Ghostmaster general, tired of the Ghostbusters' constant interference, sends three ghostly bounty hunters to eliminate the heroes at the firehouse. In the ensuing battle the Ghostbustesr are reduced to six inches in height!

At an excavation site in Brooklyn, workers accidentally uncover a dimensional gateway to the world where all lost objects go. The Ghostbusters are called in to help plug the ever-widening chasm and discover that the company is run by someone very close to Winston.

The Ghostbusters embark on a camping trip, only to run into (among other things) Bigfoot.

The Ghostbusters get a new TV as payment for a job. When Ray stays up to watch television, he sees into the Ghostbusters' future. The others don't believe him at first, but Ray is quickly proved right and the next vision shows them their deaths.

During a rare eclipse of the moon, a baby ghosts slips through a dimensional crack and becomes lost in New York. The Ghostbusters adopt the cute ghost, but soon hear reports of two other ghosts causing trouble around town.

Attending an opera, Egon and a disinterested Peter are shocked when ghostly Valkyries actually appear and create havoc. The Ghostbusters are soon facing the music... and the Valkyries!

Peter creates a Ghost Attractor which lures ghosts to the firehouse like a magnet. He believes that it will not only save the Ghostbusters a lot of legwork, but that it will also make them millionaires. Things don't go as planned.

In flashback, the Ghostbusters recount their most dangerous exploit: the time they spent the night in Heck House, the most haunted house on the planet, inhabited by thousands of ghosts! For their troubles they are to receive a million dollars apiece, provided they survive the evening until dawn, without their Proton Packs!

During an automobile race for charity, the Ghostbusters are tricked into entering a tunnel to the Netherworld run by a demon with a passion for high risk games. The team must now outrace and defeat the creature's ghoulish obstacles.

The Ghostbusters take a cruise on Ray's brand-new sailboat and get caught up in a battle between immortal demons Kishnar and Anshar. They soon possess the bodies of Peter and Ray in order to battle to the death.

Black Bart, a villainous cowboy-ghost from the Spirit World, takes over a Texas town, planning to drain its underground spectral energy well of a power source that will turn him into a full-fledged demon!

As a man who hates bugs, Peter is horrified with an ant farm arrives in the mail for Ray. Peter's phobia is put to the test when he is taken captive by the spirit of the long-dead Egyptian Insect God, Apshai, and his horde of giant insect slaves.

A group of college students are being hunted by a gang of unruly frat ghosts, but the Ghostbusters find that they must help the phantoms graduate!

The Ghostbusters' old "pal" and nemesis, Walter J. Peck, ex-EPA hatchet man extraordinaire, is back from the Gozer incident, and he's trying to raise some trouble with the Ghostbusters again. First he tries to get them arrested for illegal trespassing by calling in a phony ghost alert at a military base in Queens, but after that backfires, Peck joins up with BUFO (Bureau of Unidentified Flying Organisms), and takes Slimer with a court order. After some tests, Peck deems Slimer a hazard case and plans to destroy him with a cyclotron, forcing Ghostbusters to save Slimer from Peck.

While the Ghostbusters are on vacation, a grotesque ghost family moves into the firehouse. The guys return to find their home redecorated, all of their equipment thrown away, and the Containment Unit damaged!

A confrontation with a giant clock monster causes Egon to become younger and younger. The catch- they only have until midnight, at which time the now infant Egon will vanish from existence forever.

Stuck on a train, the Ghostbusters have to play games to bring it to a halt.

A bad lookalike of Slimer on the run arrives in the firehouse via a mirror and sends Louis and the real Slimer to the Ghost World.

By comparing new and old photographs of Janine, the Ghostbusters discover she has physically transformed during the last few years! As Janine feels less and less appreciated and attractive to the guy, the more she lets her Fairy Godmother change and possess her.

A ghostly pirate crew invades New York, intent on reclaiming their lost treasure from a museum. The Ghostbusters not only find themselves outnumbered, but on occasion, outwitted by the pirate ghosts!