The X-Files

Season 4 Episode 21

Zero Sum

8
Aired Monday 9:00 PM Apr 27, 1997 on FOX
8.6
out of 10
User Rating
279 votes

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Episode Summary

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Skinner destroys evidence to cover up a woman's death and poses as Agent Mulder to complete the task. Mulder finds out about Skinner's deception and confronts him and Skinner reveals that he is working for the Cigarette Smoking Man in order to obtain a possible cure for Scully's cancer.moreless

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Lisa Stewart

Lisa Stewart

Jane Brody

Guest Star

Nicolle Nattrass

Nicolle Nattrass

Misty Nagata

Guest Star

Fred Keating

Fred Keating

Detective Ray Thomas

Guest Star

Mitch Pileggi

Mitch Pileggi

Assistant Director Walter Skinner

Recurring Role

William B. Davis

William B. Davis

Cigarette Smoking Man

Recurring Role

Don S. Williams

Don S. Williams

1st Elder

Recurring Role

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Trivia, Notes, Quotes and Allusions

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