01E01 - 12:00 a.m.-1:00 a.m.

On the day of the California Presidential Primary, between midnight and 1:00 AM, the spy Victor Rovner sends a message from Kuala Lumpur to USA. Meanwhile, in Los Angeles, the Federal Agent Jack Bauer has returned to his family and is having trouble at home with his teenage daughter Kimberly, who blames her mother Teri for putting Jack out of the house. Teri and Jack decide to have a serious conversation with Kim, and they discover that the girl has run away from home. While trying to solve his domestic problem, Jack is called to his Counter Terrorist Unit by his colleague Nina Myers for a meeting with their chief Richard Walsh, who discloses a menace against the life of Senator David Palmer, who is running for president, and they need to find the shooter. Later, Walsh has a private conversation with Jack and tells that there is a conspiracy in the agency against David Palmer, and assigns Jack to find the conspirators. When an airplane explodes over the Mojave Desert, Jack has one additional issue to worry about.