Jack Bauer is a fictional character and the protagonist of the Fox television series 24. His character has worked in various capacities on the show, often as a federal agent of the Counter Terrorist Unit (CTU) based in Los Angeles, and working with the FBI in Washington, D.C. during season 7. Within the 24 storyline, Bauer is a key member of the CTU, its Director in Season 1, and is often portrayed as their most capable agent. Bauer's job usually involves helping prevent major terrorist attacks on the United States, saving both civilian lives and government administrations. On many occasions, Jack does so at great personal expense, as those he thwarts subsequently target him and his loved ones. He is not a crooked agent; however, Bauer's frequent use of torture to gather information has generated much controversy and discussion.

24 is an American action drama television series created by Joel Surnow and Robert Cochran for Fox. The series stars Kiefer Sutherland as US counter-terrorist federal agent Jack Bauer. Each season covers 24 consecutive hours in Bauer's life using the real time method of narration, which is emphasized by the display of split screens and a digital clock. The show premiered on November 6, 2001, and spanned 204 episodes over nine seasons, with the series finale broadcast on July 14, 2014. In addition, the television film 24: Redemption aired between seasons six and seven, on November 23, 2008. 24 is a joint production by Imagine Television and 20th Century Fox Television.