24 - Season 8 Episode 4 Day 8: 7:00 P.M.-8:00 P.M. A lot can happen in a day.
Overview: While the newly-upgraded CTU is challenged by some unexpected and complicated circumstances, Jack Bauer becomes even more involved in preventing an upcoming assassination attempt on Omar Hassan, a visiting President. Meanwhile, international security is jeopardized by an explosive event, and Jack is reunited with agent Renee Walker.