The fourth season is set 18 months after season three. Jack is now working for Secretary of Defense James Heller after being fired by CTU due to his heroin addiction. As the day begins, he gets caught up in an elaborate terrorist plot which involves James Heller and his daughter Audrey Raines.
4 - 1Day 4: 7:00 A.M.-8:00 A.M. Jan. 09, 2005
4 - 2Day 4: 8:00 A.M.-9:00 A.M. Jan. 09, 2005
4 - 3Day 4: 9:00 A.M.-10:00 A.M. Jan. 10, 2005
4 - 4Day 4: 10:00 A.M.-11:00 A.M. Jan. 10, 2005
4 - 5Day 4: 11:00 A.M.-12:00 P.M. Jan. 17, 2005
4 - 6Day 4: 12:00 P.M.-1:00 P.M. Jan. 24, 2005
4 - 7Day 4: 1:00 P.M.-2:00 P.M. Jan. 31, 2005
4 - 8Day 4: 2:00 P.M.-3:00 P.M. Feb. 07, 2005
4 - 9Day 4: 3:00 P.M.-4:00 P.M. Feb. 14, 2005
4 - 10Day 4: 4:00 P.M.-5:00 P.M. Feb. 21, 2005
4 - 11Day 4: 5:00 P.M.-6:00 P.M. Feb. 28, 2005
4 - 12Day 4: 6:00 P.M.-7:00 P.M. Mar. 07, 2005
4 - 13Day 4: 7:00 P.M.-8:00 P.M. Mar. 14, 2005
4 - 14Day 4: 8:00 P.M.-9:00 P.M. Mar. 21, 2005
4 - 15Day 4: 9:00 P.M.-10:00 P.M. Mar. 28, 2005
4 - 16Day 4: 10:00 P.M.-11:00 P.M. Apr. 04, 2005
4 - 17Day 4: 11:00 P.M.-12:00 A.M. Apr. 11, 2005
4 - 18Day 4: 12:00 A.M.-1:00 A.M. Apr. 18, 2005
4 - 19Day 4: 1:00 A.M.-2:00 A.M. Apr. 25, 2005
4 - 20Day 4: 2:00 A.M.-3:00 A.M. May. 02, 2005
4 - 21Day 4: 3:00 A.M.-4:00 A.M. May. 09, 2005
4 - 22Day 4: 4:00 A.M.-5:00 A.M. May. 16, 2005
4 - 23Day 4: 5:00 A.M.-6:00 A.M. May. 23, 2005
4 - 24Day 4: 6:00 A.M.-7:00 A.M. May. 23, 2005