Watch The X-Files Season 4 Episode 21: Zero Sum Online

	IMDB Rating: 8.2/10 from 1,000 votes
	Release: 1997 / The X-Files / Season 4 / Episode 21
	Genre: Drama \| Mystery \| Sci-Fi
	Director: Kim Manners
	Stars: David Duchovny, Gillian Anderson, Mitch Pileggi
	Synopsis: Mulder is contacted by a local police detective who thinks he has an x-files type case for him to look into. A U.S. postal worker who had sneaked into the washroom for a cigarette was killed by numerous bee stings, though there were no bees to be found. Before Mulder can even begin to look into the case, someone is going around erasing the evidence in the washroom and even some of the blood samples taken from the victim. The person doing the erasing however is Assistant Director Skinner who seems to have made a pact with the Cigarette Smoking Man.

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