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Watch Stargate SG-1 - Season 4 Episode 20 Online!:

The SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.

Writing:
  • Dean Devlin
  • Jonathan Glassner
  • Brad Wright

Stars:
Release Date: 1997-07-27
Seasons: 1 2 3 4 5 6 7 8 9 10
Metacritic: 8.1/10
TMDb: 8.3/10
  • Country: CA, US
  • Language: English
  • Runtime: 42

Other episodes for this season

Small Victories (2)
Episode 1 - Small Victories (2)
The Other Side
Episode 2 - The Other Side
Upgrades
Episode 3 - Upgrades
Crossroads
Episode 4 - Crossroads
Divide and Conquer
Episode 5 - Divide and Conquer
Window of Opportunity
Episode 6 - Window of Opportunity
Watergate
Episode 7 - Watergate
The First Ones
Episode 8 - The First Ones
Scorched Earth
Episode 9 - Scorched Earth
Beneath the Surface
Episode 10 - Beneath the Surface
Point of No Return
Episode 11 - Point of No Return
Tangent
Episode 12 - Tangent
The Curse
Episode 13 - The Curse
The Serpent's Venom
Episode 14 - The Serpent's Venom
Chain Reaction
Episode 15 - Chain Reaction
2010
Episode 16 - 2010
Absolute Power
Episode 17 - Absolute Power
The Light
Episode 18 - The Light
Prodigy
Episode 19 - Prodigy
Entity
Episode 20 - Entity
Double Jeopardy
Episode 21 - Double Jeopardy
Exodus (1)
Episode 22 - Exodus (1)