Episode 20
Camelot
SG-1 discovers the village of Camelot on an alien world, and must face Merlin's security system when they go in search of an Ancient weapon. Elsewhere, Earth and its allies assemble a fleet when a working Ori Supergate is discovered.
Season 9
As one team member transitions into a new role, another is met with hesitation in season nine. Having learned of the Ori's plan to control the mortal plane, the team must find Merlin's secret weapon that may destroy the Ori and ensure the safety of Earth.
All Episodes
Episode 1
Avalon (1)
July 15, 2005
An Air Force pilot attempts to reassemble SG-1 after they have gone their separate ways. An old "friend" arrives on Earth asking for Daniel's help in finding an ancient treasure -- and she won't take no for an answer.
Episode 2
Avalon (2)
July 22, 2005
An Ancient communications device renders Daniel and Vala unconscious, sending their minds to another galaxy -- where they inhabit the bodies of two people persecuted by the followers of an evil religion.
Episode 3
Origin (3)
July 29, 2005
Daniel comes face to face with the Ori, a fiery race of beings who demand the worship of mortals. Elsewhere, Stargate Command encounters the first Ori missionary in our galaxy.
Episode 4
The Ties That Bind
August 5, 2005
Jackson and Mitchell must join Vala on an interplanetary scavenger hunt when they learn that they are still bound together by an alien energy field.
Episode 5
The Powers That Be
August 12, 2005
SG-1 visits a world whose people once worshipped Vala as a god -- and demand that she stand trial when she confesses to manipulating them.
Episode 6
Beachhead
August 19, 2005
Samantha Carter returns to Stargate Command when the Ori seize control of a planet, using an expanding force field to gain a foothold in our galaxy.
Episode 7
Ex Deus Machina
August 26, 2005
SG-1 investigates when evidence suggests that there are still Goa'uld hiding on Earth -- including a former System Lord. Tensions between Earth and the Free Jaffa continue to mount.
Episode 8
Babylon
September 9, 2005
Colonel Mitchell is injured in a skirmish with a warrior from a mythic tribe of rebel Jaffa, and is trained in their fighting techniques only so that he may engage in a ritual battle to the death.
Episode 9
Prototype
September 16, 2005
SG-1 finds a genetically advanced Goa'uld-human hybrid created by Anubis, and returns him to Earth for study. But even keeping him alive may not be worth the risk.
Episode 10
The Fourth Horseman (1)
September 16, 2005
Earth is infected with a deadly Ori plague, prompting an ally from SG-1's past to come to their aid. Gerak proposes that the Free Jaffa follow the Ori religion.
Episode 11
The Fourth Horseman (2)
January 6, 2006
As the Ori plague spreads rapidly, SG-1 hopes that the Prior who caused the disease may hold the key to its cure. Gerak tries to rally the Jaffa to the Ori's cause, prompting Teal'c and Bra'tac to initiate a resistance.
Episode 12
Collateral Damage
January 13, 2006
When SG-1 travels to an Asgard Protected Planet, Colonel Mitchell is accused of a murder he did not commit.
Episode 13
Ripple Effect
January 20, 2006
Multiple SG-1s show up at Stargate Command, leading the "real" team to conclude that they have each been inadvertantly displaced from different parallel realities.
Episode 14
Stronghold
January 27, 2006
Baal kidnaps Teal'c as part of a plot to brainwash those Jaffa advocating a move toward democracy. Cameron Mitchell learns that an old friend is about to die.
Episode 15
Ethon
February 3, 2006
Daniel is imprisoned on a world under the influence of the Ori, and the Prometheus is caught in a firefight when SG-1 tries to rescue him.
Episode 16
Off the Grid
February 10, 2006
SG-1 is captured after a deal with the Lucian Alliance goes bad ... and the planet's Stargate goes missing. Meanwhile, a former System Lord attempts to rebuild his empire.
Episode 17
The Scourge
February 17, 2006
A tour of an off-world research base for a group of foreign diplomats turns dangerous when an insidious insect species gets loose.
Episode 18
Arthur's Mantle
February 24, 2006
Mitchell and Carter are shifted to another dimension, making them invisible to everyone at the S.G.C. Meanwhile, Teal'c and SG-9 discover that the Sodan have been brutally attacked.
Episode 19
Crusade
March 3, 2006
Vala Mal Doran makes contact with Stargate Command from the Ori home galaxy, and tells the story of her life undercover in a village of followers building the Ori's invasion fleet.
Episode 20
Camelot
March 10, 2006
SG-1 discovers the village of Camelot on an alien world, and must face Merlin's security system when they go in search of an Ancient weapon. Elsewhere, Earth and its allies assemble a fleet when a working Ori Supergate is discovered.