21. Zero Sum (1997)
After a swarm of bees mysteriously kill a postal worker in an enclosed restroom, Assistant Director Skinner covers it up by destroying the evidence. In order to complete the task he poses as Agent Mulder, however his deception backfires. When Mulder finds out and confronts him, Skinner reveals that he is working for the Cigarette-Smoking Man in order to obtain a possible cure for Scully's cancer.
Release date: 1997-04-27
User rating:
7.9 / 10
44 votes
Season number: 4
Episode number: 21
Runtime: 45 minutes
Director: Kim Manners
Writers: Howard Gordon, Frank Spotnitz
Guest stars
Mitch Pileggi
as Walter Skinner
William B. Davis
as Cigarette Smoking Man
Laurie Holden
as Marita Covarrubias
John Moore
as 2nd Elder (uncredited)
Fred Keating
as Ray Thomas
Barry Greene
as Dr. Emile Linzer
Paul Anthony McLean
as Special Agent Kautz
Don S. Williams
as 1st Elder
Jason Griffith
as Uniformed Officer (uncredited)
Morris Panych
as Gray Haired Man
Rest of guest stars - click here to expand
Nicolle Nattrass - Misty Nagata, Theresa Puskar - Mrs. Kemper (uncredited), Allan Gray - Dr. Peter Valedespino, Lisa Stewart - Jane Brody, Christopher Newton - Photo Technician, Marites Pineda - Crying Girl (uncredited)