Samhain was also one of the reoccurring villains on the Real Ghostbusters cartoon from back in the day. Samhain, the spirit of Halloween, always found a way out of the Containment unit and caused hell in NYC. He was very vulnerable to light (natural and artificial), and his goal was to cause night to slow down time so that it would be Halloween...forever! Samhain was always stopped by the Ghostbusters every time, and he was often seen in the background inside the Containment Unit when someone would be in there. Just sitting there on a rock, planning...waiting...