Season 4
22 episodes · Jun 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. A warring alien race offers to exchange their advanced technology for Earth's help in defeating their enemy.
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S4E1Small Victories (2)
Jun 30, 200044mO'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.
S4E2The Other Side
Jul 7, 200044mA warring alien race offers to exchange their advanced technology for Earth's help in defeating their enemy.
S4E3Upgrades
Jul 14, 200044mA Tok'ra archaeologist arrives at the SGC with newly discovered technology, giving the SG-1 team superhuman powers.
S4E4Crossroads
Jul 21, 200044mTeal'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.
S4E5Divide and Conquer
Jul 28, 200044mWhen 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.
S4E6Window of Opportunity
Aug 4, 200044mO'Neill and Teal'c are caught in a time loop in the SGC, and must relive the same 10 hours over and over again.
S4E7Watergate
Aug 11, 200044mThe Russians recover a Stargate from the bottom of the ocean, and turn to the SGC for help when their experiments go awry.
S4E8The First Ones
Aug 18, 200044mDr. 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.
S4E9Scorched Earth
Aug 25, 200044mSG-1 is caught in a conflict between two civilizations trying to colonize the same planet.
S4E10Beneath the Surface
Sep 1, 200044mThe members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.
S4E11Point of No Return
Sep 8, 200044mSG-1 investigates a conspiracy theorist who has detailed knowledge of the Stargate program.
S4E12Tangent
Sep 15, 200044mA test gone wrong leaves Jack and Teal'c marooned in space aboard a damaged prototype attack ship
S4E13The Curse
Sep 22, 200044mWhen his former mentor dies, Dr. Jackson returns to his roots -- and discovers an ancient Egyptian artifact containing a Goa'uld parasite.
S4E14The Serpent's Venom
Sep 29, 200044mSG-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.
S4E15Chain Reaction
Jan 5, 200144mSG-1 must adjust to a new commanding officer when General Hammond steps down -- but O'Neill discovers foul play behind the general's resignation.
S4E162010
Jan 12, 200144mTen 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.
S4E17Absolute Power
Jan 19, 200144mJackson's teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa'uld genetic memory.
S4E18The Light
Jan 26, 200144mSG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.
S4E19Prodigy
Feb 2, 200144mCarter 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.
S4E20Entity
Feb 9, 200144mThe SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.
S4E21Double Jeopardy
Feb 16, 200144mSG-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.
S4E22Exodus (1)
Feb 23, 200144mSG-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.