Episode 94 of "The X-Files"
s04e21 Zero Sum

Title: Zero Sum

Original Air Date: 04/27/1997 on FOX

Director: Kim Manners
Writer: Howard Gordon, Frank Spotnitz

Guest Stars: Allan Gray (Peter Valdespino), Fred Keating (Detective Hugel), Barry Greene (Dr. Emile Linzer), Addison Ridge (Boy), Paul McLean (Special Agent Kautz), Nicolle Nattrass (Misty Nagata), Christopher J. Newton (Photo Technician), Sterling McKay (boy)