The X-Files Season 2 Episode 18
Overview
Mulder and Scully investigate strange attacks from invisible animals inside a zoo which is near a known UFO hot spot.
Director: James Whitmore Jr.
Guest Star: Alfonso Quijada, Bruce Harwood, Charles Andre, Garvin Cross, Jack Rader, Jayne Atkinson, Jody St. Michael, Lance Guest, Lenno Britos, Tom Braidwood, Tom Glass