1 Episode 1: 24 - Season

The episode established the series' signature real-time format , where each episode represents one hour of the day.

Jack's mentor, Richard Walsh, warns him of a potential mole within CTU who may be involved in the assassination plot. 24 - Season 1 Episode 1

Jack is called into CTU at midnight and informed of an imminent threat against Senator David Palmer , the first African American with a serious chance at the presidency. 24 - Season 1 Episode 1