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- wSerie
- TV Shows
- Stargate SG-1
- Season 4
- Episode 20
Entity
Stargate SG-1 - S4 - E20
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 - 22 Episode s
4x1 - Small Victories (2)
June 30, 2000
O'Neill and Teal'c risk their lives to keep the Replicator bugs from gaining a foothold on Earth, while Carter helps the Asgard fend off a Replicator invasion.
4x2 - The Other Side
July 7, 2000
A warring alien race offers to exchange their advanced technology for Earth's help in defeating their enemy.
4x3 - Upgrades
July 14, 2000
A Tok'ra archaeologist arrives at the SGC with newly discovered technology, giving the SG-1 team superhuman powers.
4x4 - Crossroads
July 21, 2000
Teal'c is reunited with his lost love -- a woman who claims to have found a way to communicate with her symbiote and defeat the Goa'uld.
4x5 - Divide and Conquer
July 28, 2000
When a member of the SGC tries to kill a Tok'ra, it is revealed that O'Neill and Carter may be victims of an untraceable form of Goa'uld mind control.
4x6 - Window of Opportunity
August 4, 2000
O'Neill and Teal'c are caught in a time loop in the SGC, and must relive the same 10 hours over and over again.
4x7 - Watergate
August 11, 2000
The Russians recover a Stargate from the bottom of the ocean, and turn to the SGC for help when their experiments go awry.
4x8 - The First Ones
August 18, 2000
Dr. Jackson is taken captive by an Unas while on an archaeological dig. The SGC mounts a rescue operation, but discovers a danger of their own.
4x9 - Scorched Earth
August 25, 2000
SG-1 is caught in a conflict between two civilizations trying to colonize the same planet.
4x10 - Beneath the Surface
September 1, 2000
The members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.
4x11 - Point of No Return
September 8, 2000
SG-1 investigates a conspiracy theorist who has detailed knowledge of the Stargate program.
4x12 - Tangent
September 15, 2000
A test gone wrong leaves Jack and Teal'c marooned in space aboard a damaged prototype attack ship
4x13 - The Curse
September 22, 2000
When his former mentor dies, Dr. Jackson returns to his roots -- and discovers an ancient Egyptian artifact containing a Goa'uld parasite.
4x14 - The Serpent's Venom
September 29, 2000
SG-1 must stop Apophis and Heru-ur from forming an alliance of their powerful forces, while Teal'c is captured and tortured by the Goa'uld.
4x15 - Chain Reaction
January 5, 2001
SG-1 must adjust to a new commanding officer when General Hammond steps down -- but O'Neill discovers foul play behind the general's resignation.
4x16 - 2010
January 12, 2001
Ten years into the future, the former members of SG-1 must send a message into the past to prevent the extinction of the human race.
4x17 - Absolute Power
January 19, 2001
Jackson's teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa'uld genetic memory.
4x18 - The Light
January 26, 2001
SG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.
4x19 - Prodigy
February 2, 2001
Carter must help keep a promising young cadet from throwing away a future at the SGC. O'Neill and Teal'c encounter a dangerous life form at an offworld research base.
4x20 - Entity
February 9, 2001
The SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.
4x21 - Double Jeopardy
February 16, 2001
SG-1 must rescue an alien world from the Goa'uld -- with help from an unexpected source. Teal'c seeks revenge on the System Lord Cronus for the murder of his father.
4x22 - Exodus (1)
February 23, 2001
SG-1 helps to evacuate the Tok'ra to a new base -- but matters are complicated when a spy reveals their location to Apophis. The team attempts a daring plan to take out the Goa'uld's powerful fleet.