Jack Bauer is the fictional protagonist of the American television series 24, in which he has trained and worked in various capacities as a government agent, including US Army Delta Force, LAPD SWAT, and finally the Counter Terrorist Unit (CTU) Los Angeles. Within the 24 storyline, he is a key member of the latter and is often noted as the best agent CTU has. Jack's job usually involves him helping prevent major terrorist attacks on the United States, saving both civilians and government leaders. On many occasions Jack does so at great personal expense, as those he thwarts subsequently target him and his loved ones, especially in Season 1. Actor Kiefer Sutherland portrays Jack Bauer in the television show and video game, and in 2006 signed on for at least three further seasons.