The third season is set 3 years after
season two. It takes place primarily in
Los Angeles but also in northern Mexico when
Jack Bauer meets a family of drug dealers. Throughout the day, Jack Bauer and President
David Palmer attempt to stop the release of a deadly virus by
Stephen Saunders – a former government agent. Like the previous two seasons, there are two main acts in the plot: • The first act deals with the response to an imminent biological threat which is expected to be carried out unless a highly valued prisoner is released, which reveals that the entire terrorist threat was a plot to access the real virus being auctioned in Mexico. • In the second act, Jack and the other CTU agents race against time to recover the virus from a radicalized agent who is using it to kill civilians and manipulate foreign policy.
Major subplots • Jack Bauer fights against the heroin addiction that he incurred to maintain his cover. • President Palmer faces scandal during his re-election campaign involving his girlfriend, whom he met through her job as his personal physician. •
Tony Almeida and
Michelle Dessler struggle to prioritize national security over their love for each other. • Jack disapproves of the relationship that is unfolding between
Kim Bauer and
Chase Edmunds. • CTU staff members clash with
Chloe O'Brian's personality. • Palmer is forced to cover up a murder when his ex-wife
Sherry Palmer greatly oversteps her bounds. • Kim Bauer tries to prove herself fully competent even though Jack gave her the CTU job to keep an eye on her. • Jack Bauer finally kills
Nina Myers to get revenge for
Teri's death. • Stephen Saunders controls the actions of President Palmer under the threat of releasing the virus if his demands aren't met. One of the demands is the murder of
Ryan Chappelle. • CTU staff members, including Chase Edmunds and
Adam Kaufman, deal with personal problems that cause some to question their fitness for the job.
Summary Day 3 sees CTU deal with a deadly virus threat that would be released in Los Angeles. Jack's nemesis Nina Myers is also seen, while he is trying to break his heroin addiction after his undercover operation with Ramon and Hector Salazar. Jack's colleagues suspect that his difficulty quitting is related to the death of his wife Teri at the end of the first season. Jack has a new protege in tow, Chase Edmunds, but things take a turn for the worse when it is revealed Chase is seeing his daughter Kim, and it causes tension among the three of them. President Palmer is seeking re-election against Senator John Keeler, but his campaign turns sour after one of his major backers, Alan Milliken, discovers that Palmer's brother, Wayne, has been sleeping with Julia Milliken, Alan's wife. Palmer's campaign suffers a major blow when revelations come out about his girlfriend and personal physician Anne Packard. The president turns to his ex-wife Sherry to deal with Milliken. Sherry takes it all a step too far when she kills Milliken by not allowing him his medication, which he needs to stay alive. Despite David Palmer's best cover-up efforts, Keeler uses it as leverage in the campaign. Toward the end of the day, Julia kills Sherry before taking her own life, and Palmer decides not to seek re-election. Back at CTU, it turns out that Tony Almeida, Gael Ortega and Jack have been working undercover on a sting operation. Chase is initially unaware of the situation and attempts to "rescue" Jack, who is being held captive by the Salazars. Tony recovers from a gunshot wound to the neck, to return as head of CTU, with many doubting his abilities. Nina comes in just as Jack and the Salazars are trying to get hold of the virus from Michael Amador, but he plays them all for fools. After Nina is captured by CTU and interrogated, she makes a daring escape attempt only to be found by Kim. Jack comes in and finally gets revenge for the death of his wife Teri. Amador meets with his accomplice Marcus Alvers, who later plants some of the virus in a hotel ventilation system. When Michelle Dessler captures Alvers, he reveals that the mastermind of the day's events is a man from Jack's past named Stephen Saunders. Gael is killed soon after being exposed to the virus and Michelle has to deal with the threat at the hotel, as well as the unruly guests who soon discover the deadly truth. Saunders contacts President Palmer and gives him a series of assignments, one of which is the murder of Regional Division Director Ryan Chappelle. Jack and Chase try desperately to capture Saunders, but in the end, Jack is forced to kill Chappelle and hand over his body as proof. Once Saunders is captured, Jack uses all means possible to stop the threat posed by the remaining vials. This ends with Jack cutting off Chase's hand in order to access the viral delivery devices. Physicians attempt to reattach his hand as the season draws to a close. The final scene of season 3 shows Jack Bauer having an emotional breakdown as a result of the day's events until he is once again enlisted by CTU to interrogate one of the day's suspects. The day ends with Jack on his way back to work. ==Characters==