Stargate SG-1 - Season 4

First aired: 6/30/2000 22 episodes

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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Episodes

1. Small Victories (2)

Aired: 6/30/2000

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.

2. The Other Side

Aired: 7/7/2000

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

3. Upgrades

Aired: 7/14/2000

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

4. Crossroads

Aired: 7/21/2000

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.

5. Divide and Conquer

Aired: 7/28/2000

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.

6. Window of Opportunity

Aired: 8/4/2000

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.

7. Watergate

Aired: 8/11/2000

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

8. The First Ones

Aired: 8/18/2000

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.

9. Scorched Earth

Aired: 8/25/2000

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

10. Beneath the Surface

Aired: 9/1/2000

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

11. Point of No Return

Aired: 9/8/2000

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

12. Tangent

Aired: 9/15/2000

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

13. The Curse

Aired: 9/22/2000

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

14. The Serpent's Venom

Aired: 9/29/2000

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.

15. Chain Reaction

Aired: 1/5/2001

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.

16. 2010

Aired: 1/12/2001

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.

17. Absolute Power

Aired: 1/19/2001

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

18. The Light

Aired: 1/26/2001

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

19. Prodigy

Aired: 2/2/2001

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.

20. Entity

Aired: 2/9/2001

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

21. Double Jeopardy

Aired: 2/16/2001

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.

22. Exodus (1)

Aired: 2/23/2001

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.