The Terror Dogs make a second cameo appearance in the series in this episode.
When the Copycat jumps off the ghost logo on Ecto-1, the original logo blinks.
The voice actors were recorded on August 3 and 7, 1987. Recording was canceled on June 10 and June 12, 1987. Dave Coulier recorded alone on August 7, 1987.
Slimer sings part of the Ghostbusters theme song.
According to Ray, he is the only person to have a limited edition of a Captain Steel comic.