Zero Sum
April 27, 1997
45 min
4.0/5

Season 4 - Episode 21: Zero Sum
00:00 / 45:00
Overview
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.
Episode Information
TV Show
The X-Files
Season
Season 4
Episode Number
21
Air Date
April 27, 1997
Runtime
45 minutes
Rating
4.0/5
Guest Stars

Mitch Pileggi
Walter Skinner

William B. Davis
Cigarette Smoking Man

Laurie Holden
Marita Covarrubias
N
Nicolle Nattrass
Misty Nagata
T
Theresa Puskar
Mrs. Kemper (uncredited)

John Moore
2nd Elder (uncredited)
Crew

Howard Gordon
Writer

Frank Spotnitz
Writer

Kim Manners
Director

David Greenwalt
Co-Executive Producer