The episode's title and plot are a reference to "The Two Faces of Dr. Jekyll," one of many film adaptations of the famous Robert Louis Stevenson novel "The Strange Case of Dr. Jekyll and Mr. Hyde," a story about a kind scientist named Henry Jekyll who drinks a potion that turns him into an evil psychopath named Edward Hyde.
Winston unveils a new addition to Ecto-1: the water raft on the undercarriage.
The voice actors were recorded on May 20, 1987.
Marks one of the few episodes in which Slimer is trapped.
According to Peter, Slimer's favorite candy bar is Triple Caramel Crunchie.