Counterterrorism agent Jack Bauer fights the bad guys of the world, a day at a time. With each week's episode unfolding in real time, "24" covers a single day in the life of Bauer each season. Jack deals with assassination attempts, nuclear attacks, bioterrorism, torture, traitors, sleeper cells, other bad guys and the alarming tendency for his romances to end badly -- very badly.
 
The fifth season of the American drama television series 24, also known as Day 5, premiered on January 15, 2006, on Fox and aired its season finale on May 22, 2006. The season five storyline starts and ends at 7:00 a.m. – the same time frame as the previous season.