The Real Ghostbusters Season 2 Episode 48
The Canon of St Theophilus, a book missing from an abbey in Greece since the 1860s, turns up at a New York auction and is accidentally purchased by Peter. Unbeknownst to the Ghostbusters, the sealed volume contains within it the Four Horsemen of the Apocalypse.
Serie: The Real Ghostbusters
Episode Title: Apocalypse - - What, Now?
Air Date: 1987-11-18