Summary:Jack is back, this time in New York City spending time with his granddaughter. However, when a former contact comes to him with vital information on an upcoming terrorist assassination attempt, Jack has no choice but to become involved and take the man to CTU. But to get to CTU, they first need to survive a whole bunch of terrorists all trying to kill them. Meanwhile, Chloe struggles to settle in at her new position at the upgraded CTU, and President Allison Taylor negotiates with Middle Eastern leader Omar Hassan over weapons inspections... unaware that Hassan is the assassins target. Also, a journalist named Meredith Reed is suspected to have direct ties with the on-going terrorist crisis.

Summary:While the real mole remains free to threaten Hassan, reporter Meredith Reed is framed and arrested by CTU. Chloe believes in her innocence, and appeals to Jack to help her find the real mole. Meanwhile, CTU analyst Dana Walsh receives a call from a man from her past that threatens her future.

Summary:Jack tracks down the man who framed Meredith Reed, but runs afoul of two policemen who mistake him for a murderer. Meanwhile, Hastings continues his interrogation of Meredith and Chloe tries to convince him to help find the missing Jack.

Summary:In the aftermath of the aborted attack on Hassan, CTU discovers that the killer is contaminated with U-235, which shows his connection to the Russian mobs. Only one person has the experience and connections to go undercover

Summary:Four explosive hours after being unwillingly drawn back into action, Jack Bauer reteams with a risky Renee Walker to track some very dangerous leads. Meanwhile, back at CTU, a desperate Dana Walsh faces tense and untimely circumstances, and emotions escalate when President Taylor learns of a larger looming threat that jeopardizes the peace accord with President Hassan.

Summary:Undercover Agent Renee Walker confronts her painful past when attempting to broker a deal with a ruthless, but very well-connected German arms dealer. When CTU shifts its focus from the perilous circumstances surrounding Jack and Renee, lead analyst Dana Walsh comes up with a plan to quell her situation and Chloe OBrian puts Arlo Glass in his place. As Jack and Renees undercover mission takes unexpected turns, the Hassan family turmoil has President Taylor reeling as the peace agreement is jeopardized.

Summary:Despite averting the assassination attempt on foreign peacekeeping leader Omar Hassan, Jack Bauers day intensifies when he is forced to go further undercover to secure the unsecured enriched nuclear materials. As international delegates reconvene at the United Nations, President Taylors goodwill comes into question and CTU races against time to assist with the mission.

Summary:The Bazhaev abduct Jack and attempt to torture him into revealing who he really works for. Meanwhile, Renee is taken to CTU and debriefed on the death of Vladimir Laitanan, President Taylor demands results from Hastings, and Omar continues to ignore his daughter and put pressure on dissidents in his homeland.

Summary:Farhad Hassans allies turn against him and he finds himself calling CTU for help. Meanwhile, Jack comes to Renees aid when the White House prepares to prosecute her for murder, and Cole discovers Danas secret and confronts Kevin and his partner.

Summary:Dana and Cole dump a body, Farhad attempts to escape the criminals but is shot and ends up in the hospital, President Taylor faces a devastating situation where she needs help from President Hassan or she is forced to attack their country, Kayla Hassan runs away from her family to meet with a man, Renee Walker is finally released from custody, and Jack attempts to capture a terrorist who broke into the hospital to make sure Farhad was dead.

Summary:The clock races into the middle of the night when the threat of a devastating nuclear attack accelerates as Jack tracks an informed terror suspect who has an explosive strategy. Back at CTU, a key player grapples with being demoted, and the day takes an unexpected stressful turn when pesky parole officer Bill Prady enters the picture.

Summary:Jack and Cole move to rescue Kayla Hassan and secure Tarin Forush. Meanwhile, Prady continues to ask Dana probing questions, and Omar Hassan must decide whether to give up vital secrets to recover his daughter.

Summary:In the aftermath of the terrorist attack, CTU is paralyzed and Jack Bauer is their only remaining weapon. Meanwhile, the mole within CTU is revealed, and Chloe is forced to take extreme measures to bring the systems back up.

Summary:President Taylor asks Jack and Renee to get Hassan out of the country. However, when the terrorists make their demands and Taylor refuses, a faction within the White House makes plans of their own.

Summary:Hassan trades himself for the radiological device, but President Taylor learns of the arrangement and Rob Weiss involvement. She orders Jack to recover Hassan, but the mole within CTU makes the mission problematic.

Summary:The mole in CTU is revealed, and tries to make a deal for freedom. Using the information gained, Jack and Renee set out to rescue Hassan before the terrorists can force him to confess his crimes and pay for his "treason." However, they discover that Samir is one step ahead of them.

Summary:When the Russians threaten to back out of the peace process, Taylor is forced to call upon former President Logan for help. Meanwhile, Jack finds a few minutes of happiness, only to have his world come crashing down upon him. And Chloe assumes new responsibilities in the aftermath of the moles infiltration of CTU.

Summary:In the aftermath of a close friends death, Jack must deal with betrayal by the President, who will do anything to preserve the peace treaty.

Summary:To get the evidence he needs to bring down the conspiracy, Jack must rescue Dana Walsh. One friend will help him... while another will betray him. Meanwhile, the President must choose whether to risk impeachment and criminal indictment to complete the peace accord, and hires a private security team to carry out her final decision.

Summary:Jack and Ortiz rescue Dana, and must now convince her to give up the evidence connecting the Russians to the terrorists. Meanwhile, Taylor turns to Logan to deal with Jack before he can release the evidence and bring down the peace agreement... and Logan brings in the Russians to eliminate Jack

Summary:Pillar and the Russians close in on Jack, who turns to an old friend again for help. Meanwhile, Chloe realizes that Jack may have been telling the truth after all, and tries to recruit Cole to help her.

Summary:Jack works his way through the conspiracy, targeting the higher-ups in his quest for justice... and vengeance. Meanwhile, President Taylor discovers the depth of her involvement, Chloe turns to a friend to help her trace Jack through Jim Ricker, and Meredith discovers that the President will go to extreme lengths to eliminate the evidence against the conspiracy

Summary:Dalia Hassein finds out the truth about her husbands death and confronts President Taylor. Jack uses Jason Pillar to get through the security perimeter and prepares to assassinate the Russian president.

Summary:President Taylor prepares to sign the treaty, while Logan gives the order to have Jack disposed of,. Meanwhile, Chloe and Ortiz are taken into custody to prevent the evidence against the Russians from being released. Only one persons conscience can prevent the conspiracy from emerging triumphant.