Just before the release of the Four Horsemen of the Apocalypse, Egon just about completed work on a new invention called the Ectoplasmic Disintegrator. Based on the nomenclature, the device appeared to have a similar function to the Ghost Bomb. However, as Egon adjusted the ion fire rate, the device overloaded and blew up.
- Egon Spengler (2009). The Real Ghostbusters - "Apocalypse - - What, Now?" (1987) (DVD ts. 4:20-4:21). Time Life Entertainment. Egon says: "An Ectoplasmic Disintegrator."
- Edens, Mark & Edens, Michael (June 9, 1986). "The Real Ghostbusters: The Complete Collection" (2009), Volume Two, Disc Five, "Apocalypse - - What, Now?" Script, p. 7. Time Life.