Proving worthy of the last obstacle (the dragon) SG-1 along with Adria (Morena Baccarin) and Ba al (Cliff Simon) try once again to remove the Sangraal. Still unable to remove the jewel all but Adria are transported to a hidden cave where they find Merlin (Matthew Walker) encased in ice. Apparently a plan by Morgan Le Fay to destroy the Sangral but preserve the man who could construct another, hiding his whereabouts by using an obelisk and Stargate to relocate the cave at set time intervals. Reviving the old mage Daniel Jackson (Michael Shanks) explains the new struggle against the Ori and convinces him to again build a device to destroy them.

O Neill (Richard Dean Anderson) flees a Jaffa attack on an unknown planet but is captured alongside a slave before reaching the Stargate. Imprisoned and tortured by Ba'al the System Lord, O'Neill loses his memory and cannot remember where he is or why he is there. The specter of Daniel Jackson (Michael Shanks), who has been elevated to another plane of existence in death, appears in O'Neill's prison cell and offers the mystical wisdom of Oma. Since SG-1 lacks the firepower to attack Ba'al's fortress, Teal'c (Christopher Judge) suggests recruiting one of the other system lords to attack it. O'Neill and the slave escape together as Daniel appears one last time to tell him "You're going to be all right."

After learning that the Ori have successfully infiltrated six more galaxies, SG-1 goes off-world to find an Ancient weapon that Daniel Jackson (Michael Shanks) believes is the key to defeating the Ori. SG-1 travels through the gate and discovers a village in which all the inhabitants died of a mysterious illness. However, before they can make any real progress in their search, SG-1 becomes infected by a virus that causes its victims to fall into a deep sleep from which they will never wake up. Risking the spread of the virus if they return to Earth, the isolated team searches for a cure, while Daniel investigates the local library looking for clues to finding the weapon they seek. Back on Earth, Vala (Claudia Black), on General Landry's (Beau Bridges) orders, undergoes a psychiatric evaluation to determine if she is fit to join Stargate Command.

On a mission to investigate rumors of a second Ori supergate in the Milky Way Galaxy, the Odyssey, with Lt. Col. Carter (Amanda Tapping) aboard, is attacked by Anateo, a former captain of the Lucian Alliance. After receiving the Odyssey's mayday transmission, SG-1 sets out to find the Odyssey and save its crew. Vala (Claudia Black) and Daniel (Michael Shanks) track the Odyssey's subspace beacon to a chop shop on a nearby planet, but it turns out to be an ambush and Daniel and Vala are captured and brought aboard the Odyssey. Having run out of options, SG-1 decides to use the Reole Chemical - a drug that causes people to believe they are seeing someone else - to allow Lt. Col. Mitchell (Ben Browder) to infiltrate the Lucian Alliance posing as Kefflin, another captain in the Lucian Alliance and the old friend of the Alliance's leader, Netan. Mitchell discovers that Netan double crossed Anateo by sending him on a suicide mission to take the Odyssey in order to solve some of the Alliance's internal political s

The SG-1 team travels to Atlantis to attempt to establish a stable wormhole to the Ori supergate, which will prevent the Ori from sending more ships to Earth's galaxy. In order to do so, Carter (Amanda Tapping) and McKay (David Hewlett) must detonate precisely calibrated nuclear warheads to cause a wormhole to "jump" from a nearby spacegate to the supergate, without destroying their ship, the Odyssey, in the process.Meanwhile, Daniel (Michael Shanks) and Vala (Claudia Black) take advantage of their time at Atlantis to research the Atlantis database for clues to the location of Merlin's weapon. During their research, they are met by Morgan Le Fay, an ascended Ancient posing as the Lantian holographic interface, who gives them the names of two planets where the device might be located. But can she be trusted? Weir (Tori Higginson) detects a Wraith ship headed towards the Odyssey, and is unable to relay the message due to the interference of the nearby black hole. And the Odyssey detects an Ori ship headed t

Michael Shanks talks about his character's evolution and the upcoming Stargate movies.

Inasmuch as longtime regular Michael Shanks has returned to Stargate SG-1 after a one year absence, the series' seventh season opens with the SG-1 crew, headed by Jack O'Neill (Richard Dean Anderson), literally bringing Shanks' character Daniel Jackson back from the dead, rescuing his soul from the City of the Lost. Although he has no memory of his past life, Jackson proves indispensable to the team during their showdown with all-purpose villain Anubis (David Palffy). In the course of the action, the crew becomes separated from Jackson's temp replacement Jonas Quinn, who won't show up again until midway through the season (actor Corin Nemec is no longer a regular, and will hereafter be billed as a special guest star). In later episodes, Jack regresses to a teenager thanks to a cosmic disturbance involving alien abductees. Jaffan crew member Teal'c (Christopher Judge) must save his son Rya'c (Neil Denis) from a Jaffa death camp--but becomes a prisoner himself; the crew comes across a biodome on a toxic planet,

To compensate for the temporary defection of Stargate SG-1 regular Michael Shanks, the series' producers contrived to have Shanks' character Daniel Jackson lay down his life to save his SG-1 comrades, whereupon his soul passes to another plane of existence. Thus, the series' sixth season finds Jonas Quinn (Corin Nemec), emissary from the planet Kelowna, taking Jackson's place with the SG-1 team--mainly because Quinn feels responsible for Jackson's death. Team leader Jack O'Neill (Richard Dean Anderson) is agreeable to Quinn's decision, inasmuch as he needs all the help he can get to vanquish the evil Anubis (David Palffy), who possesses the power to potentially cause all Stargate portals in the universe to destroy one another. Also, O'Neill is a bit worried over the loyalties of Jaffan crewman Teal'c (Christopher Judge), who, brooding over the death of his wife, is wondering if it was a good idea to renounce his loyalty to the hated Goa'uld and cast his lot with the Stargate crew. This season, the SG-1 person

As Season Eight of Stargate SG-1 begins, Daniel Jackson (Michael Shanks) must take charge of the SG-1 team while Jack O'Neill (Richard Dean Anderson) hovers between this world and the next, while a concerted effort to rid the universe of Anubis once and for backfires disastrously. A few episodes later, Jack O'Neill, now promoted to General, is placed in full command of the Star Gate base just as the personnel faces the double threat of a fast-growing alien plant and a hostile takeover. Later on, the crew makes another foray into virtual reality at the hands of the Gameskeeper, a character introduced way back in Season Two. Also, Jaffan crew member Teal'c (Christopher Judge) tries to intervene in an earthbound domestic dispute and ends up facing a murder and kidnapping charge; Sam Carter (Amanda Tapping) considers a serious marriage proposal; and a UFO-obsessed industraliat must be persuade by O'Neill that yes, aliens exist, but, no, you can't tell anyone, ever! Plus, SG-1ers face such relatively new threats a

Resolving the cliffhanger ending established at the end of season two, season three of Stargate SG-1 finds evil Goa'uld queen Hathor (Suanne Braun) still trying to win SG-1 teammates Jack O'Neill (Richard Dean Anderson), Samantha Carter (Amanda Tapping), and Daniel Jackson (Michael Shanks) over to her side -- while the team's Jaffan ally Teal'c (Christopher Judge). In the midst of this tense situation comes some good news; Carter's father Jacob (Carmen Argenziano) -- saved from the brink of death when his body became host for Selmak, a leader of the Goa'uld resistance movement Tok'ra -- has now joined his daughter and her comrades in the ongoing battle to protect Earth from hostile aliens who've penetrated the many Stargate portals throughout the galaxy. In later episodes, a killer parasite plunges Jackson into madness and threatens the sanity of the other team members, which may force General Hammond (Don S. Davis) to kill them all for the greater good; Hammond himself later becomes a liability to the Starga