Stargate SG-1 1997 | TV Show

Cast & Crew  |  Episode Guide

A military unit uses an ancient archway to travel the universe and battle alien parasites in this cult sci-fi adventure based on the 1994 film `Stargate.' Curmudgeonly Col. Jack O'Neill teams with an archaeologist, an astrophysicist and an alien to combat (more…)

Premiered: July 27, 1997

Rating: TV-PG

User Rating:4.89 out of 5 (208 ratings)

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Season 4, Episode 20 Entity

First Aired: February 9, 2001

An alien virus infiltrates the SGC computer and gathers classified data about the crew and the ship. When the virus is presumed killed, it is learned that it has actually sought refuge in Carter's body.

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Previous Episode

Prodigy

Season 4, Episode 19

February 2, 2001

Next Episode

Double Jeopardy

Season 4, Episode 21

February 16, 2001

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