Stargate SG-1 - 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.

22 Episodes

Small Victories (2)

Season 4 - Episode 1

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 R...

The Other Side

Season 4 - Episode 2

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

Upgrades

Season 4 - Episode 3

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

Crossroads

Season 4 - Episode 4

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.

Divide and Conquer

Season 4 - Episode 5

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 min...

Window of Opportunity

Season 4 - Episode 6

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.

Watergate

Season 4 - Episode 7

The 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

Season 4 - Episode 8

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 o...

Scorched Earth

Season 4 - Episode 9

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

Beneath the Surface

Season 4 - Episode 10

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

Point of No Return

Season 4 - Episode 11

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

Tangent

Season 4 - Episode 12

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

The Curse

Season 4 - Episode 13

When 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

Season 4 - Episode 14

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.

Chain Reaction

Season 4 - Episode 15

SG-1 must adjust to a new commanding officer when General Hammond steps down -- but O'Neill discovers foul play behind the general's resigna...

2010

Season 4 - Episode 16

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.

Absolute Power

Season 4 - Episode 17

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

The Light

Season 4 - Episode 18

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

Prodigy

Season 4 - Episode 19

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 ...

Entity

Season 4 - Episode 20

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

Double Jeopardy

Season 4 - Episode 21

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 ...

Exodus (1)

Season 4 - Episode 22

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 attemp...