As the team embarks upon its tenth year, Vala, a former Goa'uld host turned freedom-fighter, joins SG-1 in their battle to defend the galaxy from the holy war of the Ori. Having discovered the existence of a weapon capable of defeating the Ori, the team is now in a race against time to find it before more systems fall to the influence of the Priors and the threat of the newly arrived Origin fleet. The season is continued with direct-to-DVD film Stargate: The Ark of Truth.
Episode 1
Flesh and Blood
Jul 14, 2006
As the Ori invade the Jaffa planet Chulak, Vala and Daniel must deal with their leader: Vala's young daughter, rapidly aged by the Ori to serve their purposes.
Episode 2
Morpheus
Jul 21, 2006
SG-1 investigates a problem off-world and soon finds that they have become victims themselves: they cannot stay awake. Meanwhile, Vala Mal Doran undergoes an evaluation on Earth, hoping to join SG-1.
Episode 3
The Pegasus Project
Jul 28, 2006
Daniel and Vala travel to Atlantis in search of Merlin's anti-Ori weapon, while Sam, and Mitchell join forces with Dr. McKay to lock out the Ori supergate.
Episode 4
Insiders
Aug 4, 2006
When Ba'al comes to Earth seeking help, Stargate Command must capture his clones and determine which one is the genuine article.
Episode 5
Uninvited
Aug 11, 2006
Teal'c discovers a world where people are being savagely attacked by an elusive creature, leading SG-1 to a stunning discovery about its potential origin.
Episode 6
200
Aug 18, 2006
Martin Lloyd seeks out SG-1 for assistance when his failed TV show based on the real Stargate program becomes a feature film.
Episode 7
Counterstrike
Aug 25, 2006
The Jaffa take the fight to the Ori, using a genocidal weapon on their new worshipers and landing SG-1 in the middle of a war they can't control.
Episode 8
Memento Mori
Sep 8, 2006
Stricken with amnesia and on the run, Vala takes a job as a waitress as she tries to piece together who she is and what happened to her.
Episode 9
Company of Thieves
Sep 15, 2006
Cameron Mitchell must go undercover inside the deadly Lucian Alliance to prevent his teammates from becoming casualties of an Alliance civil war.
Episode 10
The Quest (1)
Sep 22, 2006
SG-1 races against Baal in the hunt to find the Sangraal, Merlin's anti-Ori weapon, and comes up against a series of ancient trials.
Episode 11
The Quest (2)
Apr 13, 2007
When the team finds Merlin himself, they must help him complete the Sangraal weapon before Adria and her Ori forces can track them down.
Episode 12
Line in the Sand
Apr 20, 2007
SG-1 tries to defend a planet from the Ori by hiding its people in another dimension. Vala attempts to convince her husband Tomin of the Ori's true motives.
Episode 13
The Road Not Taken
Apr 27, 2007
An experiment gone wrong pulls Samantha Carter into a parallel reality, where she must save Earth from an Ori assault before she will be allowed to return home.
Episode 14
The Shroud
May 4, 2007
When SG-1 discovers that Daniel Jackson has been turned into a Prior of the Ori, they must determine whether or not his plan to destroy the Ori is genuine.
Episode 15
Bounty
May 11, 2007
When the Lucian Alliance puts a bounty on SG-1's heads, Cameron Mitchell finds himself a target while attending his high school reunion.
Episode 16
Bad Guys
May 18, 2007
SG-1 realizes they have stepped through the gate into another planet's museum -- but are mistaken for a band of zealous rebels who have taken hostages.
Episode 17
Talion
Jun 1, 2007
When a terrorist attack decimates a Jaffa summit Teal'c strikes out on a quest for revenge, believing that the perpetrator is one of his own pupils.
Episode 18
Family Ties
Jun 8, 2007
Earth provides sanctuary for Vala's estranged, con artist father after he provides intel about a Jaffa plot to attack the planet.
Episode 19
Dominion
Jun 15, 2007
SG-1 hatches an elaborate plan to try and capture Adria, using Vala as bait.
Episode 20
Unending
Jun 22, 2007
Trapped on board the Odyssey, the members of SG-1 must live out the rest of their lives together when Carter activates a time dilation field to save the ship from destruction.