Stargate SG-1 Season 4

Season 4

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.

Air date: 2000-06-30

Episodes: 22

Episodes

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.

Air date: 2000-06-30 • ★ 7.691

E2: The Other Side

A warring alien race offers to exchange their advanced technology for Earth's help in defeating their enemy.

Air date: 2000-07-07 • ★ 7.672

E3: Upgrades

A Tok'ra archaeologist arrives at the SGC with newly discovered technology, giving the SG-1 team superhuman powers.

Air date: 2000-07-14 • ★ 8.481

E4: Crossroads

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.

Air date: 2000-07-21 • ★ 7.111

E5: Divide and Conquer

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.

Air date: 2000-07-28 • ★ 8.14

E6: Window of Opportunity

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.

Air date: 2000-08-04 • ★ 9.2

E7: Watergate

The Russians recover a Stargate from the bottom of the ocean, and turn to the SGC for help when their experiments go awry.

Air date: 2000-08-11 • ★ 7.214

E8: The First Ones

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.

Air date: 2000-08-18 • ★ 7.44

E9: Scorched Earth

SG-1 is caught in a conflict between two civilizations trying to colonize the same planet.

Air date: 2000-08-25 • ★ 7.2

E10: Beneath the Surface

The members of SG-1 are used as forced labor in an underground alien facility after their memories are erased by the ruling elite.

Air date: 2000-09-01 • ★ 7.2

E11: Point of No Return

SG-1 investigates a conspiracy theorist who has detailed knowledge of the Stargate program.

Air date: 2000-09-08 • ★ 6.7

E12: Tangent

A test gone wrong leaves Jack and Teal'c marooned in space aboard a damaged prototype attack ship

Air date: 2000-09-15 • ★ 7.5

E13: The Curse

When his former mentor dies, Dr. Jackson returns to his roots -- and discovers an ancient Egyptian artifact containing a Goa'uld parasite.

Air date: 2000-09-22 • ★ 7.2

E14: The Serpent's Venom

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.

Air date: 2000-09-29 • ★ 7.2

E15: Chain Reaction

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.

Air date: 2001-01-05 • ★ 7.8

E16: 2010

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.

Air date: 2001-01-12 • ★ 8.2

E17: Absolute Power

Jackson's teammates notice a disturbing change in him when he is reunited with the Harcesis child and given the Goa'uld genetic memory.

Air date: 2001-01-19 • ★ 7.4

E18: The Light

SG-1 finds a deserted Goa'uld palace, where a beautiful device causes suicidal tendencies.

Air date: 2001-01-26 • ★ 6.8

E19: Prodigy

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.

Air date: 2001-02-02 • ★ 7.2

E20: Entity

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

Air date: 2001-02-09 • ★ 6.8

E21: Double Jeopardy

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.

Air date: 2001-02-16 • ★ 7.5

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.

Air date: 2001-02-23 • ★ 8.1