Once Upon a Slime
1 min read
{{Infobox television episode
| Title = Once Upon a Slime
| Image =
| Series = Real Ghostbusters
| Season = 3
| Episode = 5
| Airdate = {{Start date|1987|10|10}}
| Writer =
| Production =
| Episode list = [[Real Ghostbusters: Season 3]]<br/>[[Real Ghostbusters: Episode Guide]]
| Prev = [[The Bogeyman Is Back]]
| Next = [[The Two Faces of Slimer]]
}}
Slimer puts a book of fairy tales under one of Egon's inventions, leading to New York to become infested with fairy tale creatures.