Jack O’Neill (Richard Dean Anderson) Jack O’NeillStargate SG-1Season 1July 26, 1997Jack O’NeillStargate SG-1Season 2June 25, 1998Jack O’NeillStargate SG-1Season 3June 24, 1999Jack O’NeillStargate SG-1Season 4June 29, 2000Jack O’NeillStargate SG-1Season 5June 28, 2001Jack O’NeillStargate SG-1Season 6June 6, 2002Jack O’NeillStargate SG-1Season 7June 12, 2003Jack O’NeillStargate SG-1Season 8July 8, 2004Jack O’NeillStargate SG-1Season 9July 14, 2005Jack O’NeillStargate SG-1Season 10July 13, 2006
