Stargate SG-1 — Season 4
22 episodesFirst aired 30 June 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.
E1Small Victories (2)
7.8Jun 200044m
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.
E2The Other Side
7.7Jul 200044m
A warring alien race offers to exchange their advanced technology for Earth's help in defeating their enemy.
E3Upgrades
8.5Jul 200044m
A Tok'ra archaeologist arrives at the SGC with newly discovered technology, giving the SG-1 team superhuman powers.
E4Crossroads
7.2Jul 200044m
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.
E5Divide and Conquer
8.2Jul 200044m
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.
E6Window of Opportunity
9.3Aug 200044m
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.
E7Watergate
7.4Aug 200044m
The Russians recover a Stargate from the bottom of the ocean, and turn to the SGC for help when their experiments go awry.
E8The First Ones
7.5Aug 200044m
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.
E9Scorched Earth
7.3Aug 200044m
SG-1 is caught in a conflict between two civilizations trying to colonize the same planet.
E10Beneath the Surface
7.3Sept 200044m
The members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.
E11Point of No Return
6.9Sept 200044m
SG-1 investigates a conspiracy theorist who has detailed knowledge of the Stargate program.
E12Tangent
7.6Sept 200044m
A test gone wrong leaves Jack and Teal'c marooned in space aboard a damaged prototype attack ship
E13The Curse
7.3Sept 200044m
When his former mentor dies, Dr. Jackson returns to his roots -- and discovers an ancient Egyptian artifact containing a Goa'uld parasite.
E14The Serpent's Venom
7.5Sept 200044m
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.
E15Chain Reaction
7.9Jan 200144m
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.
E162010
8.2Jan 200144m
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.
E17Absolute Power
7.5Jan 200144m
Jackson's teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa'uld genetic memory.
E18The Light
6.9Jan 200144m
SG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.
E19Prodigy
7.1Feb 200144m
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.
E20Entity
6.9Feb 200144m
The SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.
E21Double Jeopardy
7.6Feb 200144m
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.
E22Exodus (1)
8.1Feb 200144m
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.
