Jack O'Neill

High Quality Content by WIKIPEDIA articles! Jonathan J. "Jack" O'Neill is a fictional character in the Canadian-American Sci-fi 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 recurring 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 him from the status of main character. Colonel Jack O'Neill (spelled 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, played by actor Kurt Russell, in the 1994 military science fiction film Stargate, written by Dean Devlin and Roland Emmerich.