The Best Episodes of Stargate SG-1 Season 4

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.

Director: Peter DeLuise

Writer: Joseph Mallozzi, Paul Mullie

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

Director: Martin Wood, Peter DeLuise

Writer: David Rich

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.

Director: David Warry-Smith

Writer: Joseph Mallozzi, Paul Mullie

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.

Director: Martin Wood

Writer: Tor Alexander Valenza

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.

Director: Andy Mikita

Writer: Brad Wright

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.

Director: Martin Wood

Writer: Paul Mullie, Joseph Malozzi

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.

Director: Martin Wood

Writer: Robert C. Cooper

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

Director: Peter DeLuise

Writer: Brad Wright

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

Director: Peter DeLuise

Writer: Robert C. Cooper

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.

Director: Michael Shanks

Writer: Robert C. Cooper

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

Director: Peter DeLuise

Writer: Michael Cassutt

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.

Director: Peter DeLuise

Writer: Peter DeLuise

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

Director: Martin Wood

Writer: Robert C. Cooper

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

Director: Martin Wood

Writer: Joseph Mallozzi

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

Director: Peter DeLuise

Writer: Heather E. Ash

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

Director: Andy Mikita

Writer: Joseph Mallozzi, Paul Mullie

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.

Director: Martin Wood

Writer: Peter DeLuise

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.

Director: Peter DeLuise

Writer: Joseph Mallozzi, Paul Mullie, Brad Wright

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.

Director: Peter DeLuise

Writer: Katharyn Powers

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

Director: Peter F. Woeste

Writer: James Taylor Phillips

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

Director: Allan Lee

Writer: Peter DeLuise

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

Director: William Gereghty, Bill Gereghty

Writer: Joseph Mallozzi, Paul Mullie