Extreme Ghostbusters (1997)

S1E34 A Temporary Insanity

Title: A Momentary Madness Plot: While Janine enjoys her time off, the EGB brings in a temporary replacement. However, this newcomer is actually a ghost that feeds off energy, with a sinister intent to bring down the entire team. As the crew tries to adapt to the new dynamics, they soon realize that their new hire poses a greater threat than they ever imagined.