Lieutenant General Jonathan J. "Jack" O'Neill, USAF is a fictional character in the Canadian-American military science fiction television series Stargate SG-1, Stargate Atlantis and Stargate Universe, three science fiction shows about military teams exploring the galaxy via a network of alien transportation devices. Played by American actor Richard Dean Anderson, O'Neill was a main character in the first eight seasons of Stargate SG-1 (1997–2005)...
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Lieutenant General Jonathan J. "Jack" O'Neill, USAF is a fictional character in the Canadian-American military science fiction television series Stargate SG-1, Stargate Atlantis and Stargate Universe, three science fiction shows about military teams exploring the galaxy via a network of alien transportation devices. Played by American actor Richard Dean Anderson, O'Neill was a main character in the first eight seasons of Stargate SG-1 (1997–2005). O'Neill had a recurring role in Stargate Atlantis for the first three seasons (2004–2007), and he also appeared in the 2008 direct-to-DVD SG-1 film Stargate: Continuum as a minor character. Anderson reduced his character's status in season six to spend more time with his family, eventually leaving the show after season eight, thereby removing himself from the status of main character.
Colonel Jack O'Neill (spelled Jack O'Neil in the film, and given as John O'Neill in one case, and John J. O'Neill in another) makes his first appearance,...
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