- Writers: Robert Cochran, Joel Surnow
- Stars: Kiefer Sutherland, Mary Lynn Rajskub, Carlos Bernard, Dennis Haysbert
18 months after being fired Jack Bauer returns to CTU as an Assistant to Secretary of Defense James Heller. CTU nabs a suspect who bombed a train but is unaware that the bombing is part of a larger plot. A computer programmer named Andrew Paige discovers a strange code in Turkish on the Internet and believes it's part of a terrorist plot.