Origin: 24
Age: 41
Gender: male
Appearence:

Personality: Bauer's behavior and actions are consistent with doing that which has to be done to protect the United States and its citizens to the point of giving his own life. He appears to be entirely utilitarian and consequentialist in his moral thinking: when innocent lives are in danger he behaves as though obtaining a desired result is more important than how he obtains it, and he frequently performs controversial actions if he thinks they will achieve an important goal.
Ability: Jack's service at CTU and in various prior jobs has given him many relevant survival skills. He is an expert marksman and is competent in hand to hand combat. He is also a capable pilot (of both airplanes and helicopters). (On Day 3, there are several scenes where Jack appears to be flying a CTU helicopter - but he is sitting in the left seat, whereas in helicopters the pilot usually sits on the right.) On many occasions, he has demonstrated that he is a ruthless and efficient interrogator of suspected terrorists, relying on his knowledge and experience of human psychology (and anatomy), and has also shown remarkable ability at resisting torture when subjected to it himself. However, he also utilizes such information to help those who are wounded or victimized by the days' events.
Jack has some knowledge of foreign languages. He is seen speaking Spanish briefly in Season 1 and Russian in Season 6. He also understands some Serbian, which he presumably learned for a mission he undertook in Kosovo.