Editing Jack O'Neill (section)

==Character arc==
Jack O'Neill is a [[United States Air Force]] colonel with experience in special operations before joining the Stargate Program.<ref name="thegamekeeper">{{cite episode| title=The Gamekeeper | series= Stargate SG-1 |credits = [[Jonathan Glassner]]is  and [[Brad Wright]] (is) | network = [[Showtime (TV network)|Showtime]] | season = 2 | number = 4}}</ref> He was married to Sara O'Neill, but their marriage suffered when Jack sank into a deep depression after their son accidentally shot himself with O'Neill's pistol. He then joins a dangerous mission through the [[Stargate (device)|Stargate]] with a couple of airmen and Dr. [[Daniel Jackson (Stargate)|Daniel Jackson]], who deciphers how to use the Stargate. They are transported to another planet. O'Neill's standing order is to detonate a [[Special Atomic Demolition Munition|nuclear warhead]] near the Stargate at any sign of danger. But a young boy named [[List of recurring alien characters in Stargate SG-1#Skaara|Skaara]] gives him a renewed sense of life. After the defeat of [[Goa'uld characters in Stargate#Ra|Ra]], O'Neill and his team return to Earth, while Jackson remains on the planet.<ref name="stargatefilm">{{cite AV media | title=[[Stargate (film)|Stargate]] |others = [[Roland Emmerich]] (director), Roland Emmerich and [[Dean Devlin]] (writers) | publisher = [[Metro–Goldwyn–Mayer]] (MGM) and [[Carolco Pictures|Carolco]]}}</ref> Though he and Sara were still together when Jack was initially recruited for his first mission through the Stargate,<ref>Stargate [1994] https://www.imdb.com/title/tt0111282/</ref> by the time he returned she had left him.<ref>Stargate SG-1: Children of the Gods [1997] https://www.imdb.com/title/tt0234794/</ref>

O'Neill returns to the Stargate Program when the [[Goa'uld]] [[Goa'uld characters in Stargate#Apophis|Apophis]] attacks the Earth installation via its stargate. He is given command of the SG-1 team, which consists of himself, [[Samantha Carter]], [[Teal'c]] and Jackson.<ref name="childrenofthegods">{{cite episode | title=Children of the Gods | series= Stargate SG-1 |credits = [[Jonathan Glassner]] and [[Brad Wright]] (writers) | network = [[Showtime (TV network)|Showtime]] | season = 1 | number = 1-2}}</ref> Eventually O'Neill gets the Repository of the Ancients temporarily "downloaded" to his brain and becomes the first modern human to travel to another galaxy, the [[Asgard (Stargate)|Asgard]] home galaxy.<ref name="thefifthrace">{{cite episode |title=The Fifth Race |series=Stargate SG-1 |credits=David Warry-Smith (director), [[Robert C. Cooper]] (writer) |network=[[Showtime (TV network)|Showtime]]  |season=2 |number=15}}</ref> A second download of the Ancients' knowledge into his brain during the season 7 finale, allows him to lead SG-1 to an Ancient outpost in Antarctica. O'Neill possesses the ATA gene, and thus is able to operate the Ancient weapons chair and save Earth from Anubis's fleet.<ref name="lostcity">{{cite episode| title=Lost City | series= Stargate SG-1 |credits =[[Martin Wood (director)|Martin Wood]] (director), [[Brad Wright]] and [[Robert C. Cooper]] (writers) | network = [[Sky1|Sky One]] | season = 7 | number = 21-22}}</ref> With the Ancient knowledge about to overwhelm his personality and kill him, he is placed into a stasis pod in the outpost until [[Asgard (Stargate)#Thor|Thor]] of the [[Asgard (Stargate)|Asgard]] is able to remove the knowledge and save his life. After that event, O'Neill is promoted to [[brigadier general (United States)|brigadier general]] and is given command of [[Stargate Program#Stargate Command|Stargate Command]].<ref name="New Order">{{cite episode | title = New Order | series = Stargate SG-1 | credits = [[Andy Mikita]] (director), [[Joseph Mallozzi]] & [[Paul Mullie]] (writers) | network = [[Syfy|Sci-Fi Channel]] | season = 8 | number = 1-2}}</ref> O'Neill is promoted again off-screen and becomes the new head of the [[Stargate Program#Office of Homeworld Security/Homeworld Command|Office of Homeworld Security/Homeworld Command]] after the retirement of General Hammond, with Major General [[List of Stargate SG-1 characters#Hank Landry|Hank Landry]] taking his position as the new commander of Stargate Command.<ref name="avalon">{{cite episode| title=Avalon | series= Stargate SG-1 |credits =[[Andy Mikita]] (director), [[Robert C. Cooper]] (writer) | network = [[Syfy|Sci-Fi Channel]] | season = 9 | number = 1-2}}</ref>

In the pilot of Stargate Atlantis, O'Neill convinces [[John Sheppard (Stargate)|John Sheppard]] to join the [[Atlantis (Stargate)|Atlantis expedition]] to the [[Mythology of Stargate#Atlantis and the Pegasus galaxy|Pegasus Galaxy]].<ref name="rising">{{cite episode |title=Rising |series=Stargate Atlantis |credits=[[Martin Wood (director)|Martin Wood]] (director), [[Robert C. Cooper]] & [[Brad Wright]] (writers) |network=[[Syfy|Sci-Fi Channel]] |season=1 |number=1-2}}</ref> In 2006, he, along with [[Richard Woolsey]], visits Atlantis to create a treaty between the humans of [[Earth]] and the [[Ancient (Stargate)|Ancients]].<ref name="thereturn">{{cite episode |title=The Return |series=Stargate Atlantis |credits=[[Brad Turner (director)|Brad Turner]] (director), [[Martin Gero]] (writer) |network=[[Syfy|Sci-Fi Channel]] |season=3 |number=10}}</ref> The death of O'Neill is briefly shown in an [[Parallel universe (fiction)|alternate timeline]] where [[Goa'uld characters in Stargate#Ba'al|Ba'al]] controls the [[Goa'uld#Goa'uld Empire|Goa'uld Empire]].<ref name=gw_third /> O'Neill reappears as a [[Lieutenant general (United States)|lieutenant general]] in ''[[Stargate Universe]]'' with [[Nicholas Rush]], where he is recruiting [[Eli Wallace]] into the [[Icarus Base|Icarus Project]]. After the attack on the Icarus Base, he contacts Carter from [[The Pentagon]] to talk about the ongoing situation. With help from the Ancient Communication Stones, [[Everett Young]] body swaps with Colonel [[List of Stargate Universe characters#David Telford|David Telford]] to tell O'Neill about a dire situation in which they find themselves.<ref>{{cite episode| title=Air | series=Stargate Universe |credits =[[Andy Mikita]] (director), [[Brad Wright]] & [[Robert C. Cooper]] (writers) | network = [[Syfy|Sci-Fi Channel]] | season = 1 | number = 1-3}}</ref>