Stargate SG-1 Season 4 Episode 20 Entity ( Air Date 2001-02-09 ) Genre Sci-Fi & Fantasy, Action & Adventure category. Overview "The SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.".
Stargate SG-1 Season 4 Episode 20 Entity
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- Watch: Stargate SG-1 Season 4 Episode 20 Entity on CWR-CRB
- Stars: Ben Browder, Amanda Tapping, Christopher Judge, Michael Shanks, Claudia Black, Beau Bridges
- Director: Joseph Mallozzi, Brad Wright, Peter DeLuise, Paul Mullie, Robert C. Cooper, Michael Greenburg, Dean Devlin, Richard Dean Anderson, Joel Goldsmith
