The Real Ghostbusters

Season 3, Episode 10

Episode Title: The Grundel

Air Date: 1987-11-07

Overview:

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.