[s4e1] Day 4: - 7:00 A.m.-8:00 A.m.

The train bombing allows a terrorist named Dar to steal a high-security briefcase containing a device known as the Dobson-type Override , which can control nuclear power plants.

Jack's new love interest and daughter of the Secretary of Defense. James Heller : The Secretary of Defense and Jack's new boss.

The stern new Director of CTU who previously fired Jack due to his heroin addiction. Edgar Stiles: A brilliant but socially awkward CTU analyst. [S4E1] Day 4: 7:00 a.m.-8:00 a.m.

In the opening hour of , set 18 months after the events of Day 3, Jack Bauer has been fired from CTU and is now working as a special assistant to U.S. Secretary of Defense James Heller .

As the hour concludes, terrorists ambush the Secretary and his daughter, Audrey Raines (who is also Jack's secret lover), at her brother Richard's house. Jack is forced to listen helplessly over the phone as Audrey is abducted. The train bombing allows a terrorist named Dar

The episode begins at 7:00 a.m. with a catastrophic in Santa Clarita, orchestrated by a terrorist cell as a diversion. While at CTU for a budget meeting on behalf of Heller, Jack becomes suspicious of the official narrative and takes matters into his own hands by brutally interrogating a suspect, Tomas Sherek , against the orders of the new CTU Director, Erin Driscoll . Key Plot Points

A tactical field agent working under Driscoll. The stern new Director of CTU who previously

The episode introduces a seemingly normal suburban family, the Arazes, who are revealed to be a deep-cover sleeper cell involved in the day's attacks. New Characters Introduced