Stargate SG-1

Season 4

TV-PG

92%

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.

Where to Watch Season 4

22 Episodes

Small Victories (2)
E1
Small Victories (2)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.
The Other Side
E2
The Other SideAfter 3 'impact' events against the iris, the SGC is contacted by humans that are at war and under attack. They plead for help and SG1 visits them. They are technologically advanced, and living underground in bunkers with much of their population in stasis, protected by shields and remotely piloted aircraft. But all is not as it seems and Jackson asks questions that elicit disturbing answers.
Upgrades
E3
UpgradesThe SGC is visited by a Tok'ra named Anise who brings some armbands used by the soldiers of a long extinct race, which are supposed to increase the abilities of the wearers. O'Neill, Carter and Jackson put the armbands on and it increases their physical strength, but it also causes them to make rash decisions. Can they get the armbands off before they cause their deaths?
Crossroads
E4
CrossroadsAn old love of Teal'c, Chulak Temple Priestess Shan'auc, arrives at the SGC saying she can communicate with her symbiont. Teal'c does not believe her until he tries and sees that it is true. They travel to the Tok'ra, as Shan'auc's symbiont needs to blend with a host, but isn't it really still a Goa'uld?
Divide and Conquer
E5
Divide and ConquerWhen an SG-team member tries to assassinate the Tok'ra leader, it is believed that some of the SGC have been converted into Za'tarc - programmed assassins. The Tok'ra Freya comes to the SGC with Martouf to try and test all SG-team members. But the Za'tarc detector suggests that O'Neill and Carter are actually Za'tarcs. Is this correct and is there another Za'tarc at the SGC?
Window of Opportunity
E6
Window of OpportunityO'Neill and Teal'c are caught in a time loop in the SGC, and must relive the same 10 hours over and over again.
Watergate
E7
WatergateThe Russians recover a Stargate from the bottom of the ocean, and turn to the SGC for help when their experiments go awry.
The First Ones
E8
The First OnesWhile on an archaeological dig at the original Goa'uld home world, Daniel is captured by a young Unas. He tries to communicate with it and slowly builds a rapport. Meanwhile, SG-1 comes to the planet to find Daniel and they soon realise that some of the SG-team members there may have been taken over by Goa'uld. Will they be able to discover which ones in time to rescue Daniel?
Scorched Earth
E9
Scorched EarthSG-1 is caught in a conflict between two civilizations trying to colonize the same planet.
Beneath the Surface
E10
Beneath the SurfaceThe SG-1 team awake to find they have lost their memories. They believe they are workers in an underground power station. They are told that they are helping to preserve life during an ice age. In truth, they are slave labor to a huge domed city above. When Teal'c starts to recover his memory and is given another amnesia treatment, he forgets his Kelno'reem and starts to die. Will the others recover their memories in time to save him?
Point of No Return
E11
Point of No ReturnThe SGC is contacted by a strange man called Martin, a conspiricist who believes he is an alien. The question is, how does Martin know about the Stargate and how come he has a gate address and is he being drugged by others?
Tangent
E12
TangentO'Neill and Teal'c test-fly the experimental spaceship X301, created from two captured Death Gliders. While they attempt a test run in the atmosphere, the craft flies into space. A message from Apophis plays to say that the traitors who took his property would die in the cold of space. Can the SGC find a way to bring them back, or will they die drifting ever further from Earth?
The Curse
E13
The CurseWhen his former mentor dies, Dr. Jackson returns to his roots -- and discovers an ancient Egyptian artifact containing a Goa'uld parasite.
The Serpent's Venom
E14
The Serpent's VenomSG-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.
Chain Reaction
E15
Chain ReactionSG-1 must adjust to a new commanding officer when General Hammond steps down -- but O'Neill discovers foul play behind the general's resignation.
2010
E16
2010Ten 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.
Absolute Power
E17
Absolute PowerWhen a "chosen" boy found on planet Abydos is brought to SGC, he sends a telepathic message, causing Daniel Jackson's personality to undergo disturbing changes. Will the rest of SG-1 be able to solve the mystery of the boy's origin before he becomes a power-hungry warmonger?
The Light
E18
The LightSG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.
Prodigy
E19
ProdigyCarter 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.
Entity
E20
EntityThe SGC is invaded by an alien life force that takes up residence in the base computer system -- and in Major Carter.
Double Jeopardy
E21
Double JeopardySG-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.
Exodus (1)
E22
Exodus (1)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.