SG-1

"SG-1 has a surprisingly good habit of beating the odds."

- George S. Hammond

SG-1 is the designated flagship team of Stargate Command.

Commanding officers

 * Colonel Jack O'Neill (1997-2000, 2000-2004).
 * Colonel Robert Makepeace (2000).
 * Lt. Colonel Samantha Carter (2004-2005).
 * Lt. Colonel/Colonel Cameron Mitchell (2005-present).
 * Major Evan Lorne (Alternate reality) (~2007).

XO (Executive Officer)

 * Captain/Major/Lt. Colonel/Colonel Samantha Carter (1997-2004, 2005-2007, 2008-2009).

Technical officers

 * Captain/Major/Lt. Colonel/Colonel Samantha Carter (1997-2007, 2008-2009).

Research specialists

 * Dr. Daniel Jackson (1997-2002, 2003-present).
 * Captain Mathison (2002) (lasted two hours).
 * Captain Hagman (linguist) (2002).
 * Jonas Quinn (2002-2003).

Cultural advisors

 * Teal'c (1997-present).
 * Vala Mal Doran (2006-present).
 * Daniel Jackson (1997-2002, 2003-present).

1997 - 1998
Upon its formation in 1997, SG-1 was composed of three individuals; Colonel Jack O'Neill, Dr. Daniel Jackson and Captain Samantha Carter. These individuals went to Chulak and were imprisoned by the Goa'uld System Lord Apophis who sought hosts for his Goa'uld offspring.

They were rescued by Teal'c, Apophis’s First Prime and one of his Jaffa warriors who had grown convinced that Apophis was not a God. After some encouragement from Jack, Teal’c helped all of Stargate Command personnel and their fellow prisoners escape their prison on Chulak and return safely to Earth.

Teal’c eventually allied himself with the SGC against the Goa'uld and after a series of tests, officially joined SG-1 in the hope that they would help bring his people, the Jaffa to freedom.

1999 - 2000
In early 1999 Samantha Carter was promoted to the rank of Major. When Colonel Jack O’Neill went undercover, as part of an operation to reveal the identities of rogue NID agents and moles planted in Stargate Command, he left his commanding position open on SG-1. Major General George S. Hammond assigned Colonel Robert Makepeace as SG-1’s new commander until it was discovered that Makepeace was the mole planted in the SGC to retrieve alien technology. He was placed under arrest for treason and Jack returned to his command of SG-1.

2001 - 2003
In the year 2001, SG-1 was temporarily disbanded when a new commander was placed in charge of Stargate Command. Colonel Jack O'Neill was forced into some time off to consider his career options, while Major Samantha Carter and Dr. Daniel Jackson were assigned base-only positions and Teal'c was assigned to SG-3. This arrangement did not last long, and soon everyone was in their proper positions once again.

In the same year, Teal'c was brainwashed into believing that he still served for Apophsis and as such, Teal'c defected from SG-1 to resume working for Apophis once again as the System Lord's First Prime. Despite SG-1's best efforts, Teal'c remained adamant that Apophis was a God. It eventually took Teal'c's mentor, Bra'tac performing the Rite of M'al Sharran which ultimately loosened Apophis's grip on Teal'c's mind and finally brought Teal'c back to his senses. Once he had recovered, Teal'c requested permission to rejoin SG-1 which General Hammond granted.

SG-1 remained primarily composed of the same four individuals up until May 2002, when Dr. Daniel Jackson was exposed to a lethal dose of radiation which resulted from a lab accident in the nation state of Kelowna. He was given the opportunity to ascend to a higher plane of existence by the Ascended Being Oma Desala to escape permanent death and to join the enlightened. He accepted the offer.

Several replacements were attempted to fill the void that Dr. Daniel Jackson left behind. Captain Hagman was the ninth recruit who tried to fill Jackson's shoes. The remaining members of SG-1 were not very welcoming of any person assigned to replace their fallen comrade, so they quickly booted the poor linguist out.

Eventually, after a series of rejections, Jonas Quinn, a native of Kelowna, joined SG-1, taking over the position left vacant by Jackson's departure. Jonas was witness to Jackson's courage on his homeworld and after realizing that his government was not honorable in trying to blame Daniel for the accident, calling it sabotage, he defected to Earth, bringing a sample of the radioactive material Naquadria with him in hopes that shield technology could be developed to protect his people from the Goa'uld.

2003 - 2005
Dr. Daniel Jackson continued to watch over his teammates while he was an Ascended Being, but when he tried to protect Abydos from Anubis he was returned to human form and left without his memory. When SG-1 went to Vis Uban thinking that it might be the location of The Lost City of the Ancients, they found Daniel living among the nomads. He had no memory of who he was and had taken the name Arrom. Jack and Sam convinced him to come home with them to discover his identity and past and, after deep consideration, he decided to go with them back to Earth. Soon, he was given a position back on SG-1, making him a fifth member of the team for a short while.

Daniel joined Jonas on a mission to destroy the advanced weapon Anubis possessed on his mighty ship. They were sent to hack into Anubis’ computer system. They were successful in getting into the computer and the weapon was destroyed, but in their attempt to get off of the ship, Jonas was captured. Daniel worked at getting him free and together they were able to escape to Kelowna where Anubis’ ship was stationed over the capital city of Jonas’ nation. They were aided by other System Lords to destroy Anubis' mothership, but Anubis escaped. Jonas was asked to return to his homeworld as representative on their now-united world’s council to educate them on the Goa'uld threat. Jonas's departure from Stargate Command meant that SG-1 returned to the original four-team members.

About a year later, Colonel Jack O'Neill was given a promotion to Brigadier General and given command of Stargate Command.

Major Samantha Carter also received a promotion, giving her the rank of Lt. Colonel. With these promotions, Carter moved into the commanding officer position of SG-1. It was deemed by O’Neill that SG-1 would remain a three-member team, but if he ever decided to go out in the field, he’d do so with SG-1.

Carter's lead of SG-1 lasted only one year, up until the defeat of the Goa'uld and the Replicators. Afterwards, the team disbanded as each member went to different assignments. Teal'c was the first to leave, joining the Free Jaffa Nation’s High Council. Carter went to Area 51 to lead in the facility’s Research and Development department while she helped Cassandra Fraiser through a rough time in her life. Dr. Daniel Jackson was the last of the original team still at Stargate Command, since Jack O'Neill was promoted to Major General and given the command of Homeworld Security in Washington D.C., but his time there was coming close to an end as he began packing his office for his move to Atlantis in the Pegasus Galaxy.

2005 - 2007
The new commander of Stargate Command, Major General Henry Landry, was still unpacking his office when Lt. Colonel Cameron Mitchell reported to his new position. Mitchell was given his choice of positions by Major General Jack O'Neill and he chose to join SG-1 and was told that he was going to lead SG-1 and needed to pick the new members of his team. He was extremely disappointed that he would not be working with Lt. Colonel Samantha Carter, Dr. Daniel Jackson, and Teal'c.

Landry purposefully placed Mitchell in assignments which would involve him with Daniel's projects, ones that had prevented Daniel from going to Atlantis, until finally, Mitchell reunited the team as they faced a new and powerful galactic threat in the form of Ascended Beings known as the Ori and their advanced human missionaries, called Priors.

The Ori managed to conquer several worlds through the use of the Priors, but their work throughout the galaxy was quickened by the arrival of four Ori warships through a Supergate. One of these Supergates had been destroyed when the thief and con artist Vala Mal Doran substituted a Tel'tak as one of the gate’s sections. Vala attempted to escape through the Transportation rings, but her matter stream was diverted by the gravitational forces of the nearby black hole and transported to the Ori’s home galaxy.

On Earth, during a mission to expose Ba'al, Mitchell formally re-formed SG-1 with Carter, Jackson, and Teal'c.

Meanwhile, Vala was impregnated by the Ori with a child who was later born on one of the warships which had just arrived and decimated the Milky Way Galaxy’s allied fleet. The child, called the Orici, was a daughter Vala named Adria. Daniel rescued Vala from the warship, but they had to leave Adria behind. After serving as a consultant with Stargate Command on a probationary basis because her past dealings with the SGC, and especially with Daniel, were manipulative and detrimental, Vala proved herself as trustworthy in the fight against the Ori. Vala herself claimed that her changes were due in large part because someone finally believed in her and she actually found a home on Earth with the people of the SGC. She was given a position on SG-1, becoming its fifth member.

2008 - present
Following the defeat of the Ori, both Samantha Carter and Cameron Mitchell were promoted to the rank of Colonel, and Carter was given the command of Atlantis for a year. Carter and Major General Jack O'Neill joined SG-1 (Mitchell, Dr. Daniel Jackson, Teal'c, Vala Mal Doran) at the new Tok'ra homeworld after the last of the Ba'al clones was captured. They all wore the SG-1 patch to represent the many years that their team fought the Goa'uld System Lords. The last Ba’al symbiote clone was extracted from the host, but the Tok'ra and Tau'ri were unaware that the original Ba’al had evaded capture.

The original Ba’al himself traveled back in time to 1939 to prevent the Stargate from ever reaching the United States, but he was killed by an alternate future version of Cameron Mitchell, who witnessed Ba’al’s changes to the timeline and traveled back in time to prevent Ba’al’s plan from ever taking place, thus saving the timeline and defining the true end of the rule of the System Lords.

The current status of SG-1 is unknown. Carter is no longer part of the team and is now in command of the USS George Hammond.

Accomplishments

 * Responsible for the deaths of a number of Goa'uld System Lords, such as Apophis, Ares, Cronus, Hathor, Nirrti, Ra and Sokar. Also responsible for the downfalls of Anubis, Ba'al and Heru'ur.
 * Destroying the Replicators and bringing the downfall of the Goa'uld Empire at the Battle of Dakara.
 * Making Earth's first contact with the Asgard, the Tok'ra, the Tollan and the Nox.
 * Rescuing SG-10 from P3W-451 that was nearing the event horizon of a black hole. However, the team's fourth member was lost after the Stargate activated with a fair bit of Vorash's sun in transit.
 * Saving Earth on a number of occasions from the Goa'uld, the Replicators and the Ori threat.
 * Sending the Sangraal to the Alteran Home Galaxy and destroying the Ori.
 * Diminishing Ascended Adria's power enough for Morgan Le Fay to engage her in an eternal battle.
 * Adria was quite possibly defeated by Morgan Le Fay after the Priors of Milky Way lost their belief of Origin, further diminishing Adria's powers.

Alternate realities

 * In the alternate reality to which Daniel Jackson was accidentally transported to 1998, SG-1's Iris Deactivation Code remained the same as in our reality. However, he soon discovered that neither he nor any of his teammates were members of SG-1 in this reality. The Daniel Jackson of this reality never joined the Stargate Program, Jack O'Neill was a brigadier general and the commanding officer of the SGA, Doctor Samantha Carter was a civilian scientist who seemingly worked from the SGA while Teal'c was still the First Prime of Apophis.
 * In 2006, an alternate version of SG-1 came to our reality in an attempt to steal a Zero Point Module from Atlantis and return it to their reality to use in securing their Earth from an Ori attack. When the original SG-1 took steps to stop additional SG-1s from arriving, the alternate SG-1 gained control of the Prometheus and set course for Atlantis. Eventually, the original Mitchell outsmarted his counterpart and his team was captured. The original SG-1 was able to use the alternate SG-1's methods to send the various SG-1s back to their own realities.
 * In another alternate reality, SG-1 consisted of Daniel Jackson. Cameron Mitchell, Doctor Janet Fraiser and Martouf/Lantash. They became stranded in our reality in 2006. In their reality, Earth was attacked by the Prior virus, though the team was given the anti-virus to combat it, since our reality had already combated the plague. In this reality, Brigadier General Jack O'Neill was still the commanding officer of Stargate Command.
 * In another alternate reality, SG-1 wore Blue Digital Tiger Stripe uniforms. In 2006, the team were under heavy fire and ended up in our reality. Shortly afterwards, they were examined in the infirmary. Eventually, this SG-1 were sent back to their own reality.
 * In another alternate reality, SG-1 consisted of Cameron Mitchell and three young men who appeared to be Jaffa. They wore Atanik armbands.
 * In another alternate reality, SG-1 wore Hazmat suits. In 2006, the team ended up in our reality but were eventually sent home to their own.
 * In another alternate reality, SG-1 wore green jungle fatigues. In 2006, the team ended up in our reality but were eventually sent home to their own.
 * In another alternate reality, SG-1 wore Digital Woodland USMC MARPAT uniforms. Notably, the Teal'c of this reality was still bald. In 2006, the team ended up in our reality but were eventually sent home to their own.
 * In the alternate reality to which Lt. Colonel Samantha Carter is accidentally transported in 2007, Major Evan Lorne was the commanding officer of SG-1. Until 2007, his teammates included Major Samantha Carter and Daniel Jackson. However, the Sam of his reality was killed in the accident which brought her counterpart to his reality while Daniel was captured by the Ori several weeks earlier. The same fate had befallen the Daniel of our reality at approximately the same time. Major Lorne informed the Sam of our reality that Teal'c had left the SGC several years earlier following the defeat of the Goa'uld and Vala Mal Doran was imprisoned in Area 51 while Cameron Mitchell, after criticising the US government for its use of martial law, received no more medical treatment for the injuries which he sustained in the Battle of Antarctica and was confined to a wheelchair.