Another classic J. Michael Straczynski, this episode was the first to have the guys deal with Halloween. It is also the first time the show introduced one of the Ghostbusters greatest enemies and the official mascot of Octovember: Samhain. The episode is super fun and full of the Fall spirit.
When ancient ruins arrive in New York for examination, the evil spirit
of Samhain is released! He declares that Halloween should last forever
and calls forth an army of the night!