"The Dirty Half-Dozen" Episode 32 (Season 1, Episode 32) Aired: Saturday April 1, 1989 on ABC Writer: Temple Mathews

Synopsis
Ghoullem and Zugg, the ghost gangsters from "Scareface", return from the South Pole to get revenge on Slimer. They put the Ghostbusters to sleep with a sleep-walking potion, and Slimer is the only one who can rescue them (which is just what Ghoullem and Zugg want). However, Slimer doesn't go unprepared, as he gets all his friends to help him.

Fun Facts

• Series regular Alan Oppenheimer is the voice of Ghoullum. Parts of his Ghoullum voice are similar to his Prime Evil voice in "Filmation's Ghostbusters" animated series.