The Best Episodes Written By Howard Gordon

Gracie's life is in danger unless Pritchard and Duval can reach her in time and rescue her from Connor and Otto's experiment. Meanwhile, Mary and Alexa search for a way to save Pritchard since he can no longer regenerate in the tank; and Otto struggles to come to grips with his decisions that have touched so many lives.

Jack shows Heller the incriminating recording in the hopes that he will help them take down Logan, but Heller has plans of his own that will save face for the presidency. Miles tricks Chloe into leading CTU to Jack and Audrey. Mike and Martha both become more suspicious of Logan's actions, while Heller confronts the president with an ultimatum.

Vincent is captured and held hostage by two scientists who stick him in a cage. Catherine considers a new job in Providence.

Father's past is revealed when he goes above for the first time in over thirty years to see a friend. When he gets to his friends office he finds his friend is dead. Father is then charged with murder.

Laura, a deaf-mute tunnel dweller, witnesses the murder of a police officer, for which another man is framed.

Paracelsus, a former friend of Father's, sells an hallucinatory drug in the world above.

Paracelsus kidnaps Catherine, which causes Vincent to begin a quest to rescue her.

Laura, a deaf ex-tunnel dweller, falls in with a deaf street gang.

Catherine's father dies and Vincent allows her to come below to grieve. He also makes her go back above because he knows that she does not belong there no matter how he feels. Catherine finally agrees and goes back above.

Catherine finds out while visiting Joe in the hospital that she is pregnant. As she heads to her car in the parking garage she is kidnapped. Due to Vincent's recent illness he can not sense where she is. He knows nothing of the child that she carries. The kidnappers lock her in a cell. They want only the child. They think that if they take the baby they will get Vincent to emerge and that is exactly what they want. They continue to hold Catherine captive as Vincent frantically searches for her. It seems completely hopeless without his sense of her. Yet he vows to find her no matter the cost.

Diana notices things in Catherine's apartment that have Vincent's name on them. She begins to realize that Vincent was her lover and probably the father of her child. She then decides to go to where Catherine is buried and wait for Vincent to do the same. One night it works. Vincent is sick and literally falls on top of Catherine's grave. Diana finds him and carries him back to her apartment where she nurses him back to health.

As the missile speeds toward its destination, Mandy cuts a deal with Jack and the President to give up Marwan's location in exchange for a full pardon on all of her crimes. Tony and Michelle share a happy reunion, but Jack finds his relationship with Audrey shattered as she makes her feelings known. Logan's advisor suggests a drastic course of action when the Chinese government demands that Jack be handed over to them for trial. Palmer tries desperately to warn Jack of the danger against him. Jack's life changes forever as Tony, Michelle and Chloe help him to evade the trap set for him by Secret Service.

Jack and Henderson wage an assault on the submarine as Bierko prepares to launch an attack against L.A. Chloe brings in someone from her past to aid her. Martha and Aaron enlist Mike's help in their plans to expose Logan.

Lynn orders Curtis to take Jack into custody for violating presidential orders, but Jack breaks away from Curtis when Nathanson contacts him through Audrey and offers information on the location of the nerve gas. Lynn begins to unleash on his coworkers as he discovers that they may be working against him to aid Jack. The head of the terrorists makes a demand on Logan, and Martha takes a dangerous step to get her husband's attention.

Jack and Sherry Palmer prepare for a dangerous meeting with the head of the war conspiracy at the L.A. Coliseum; David Palmer sits in as the Cabinet waits for confirmation of the Cypress Chip's invalidity; the air strike on the Middle East draws nearer; the conspiracy goes to an old agent to put Palmer out of play.

Jack bargains with a German intelligence agent in order to find the woman who can lead him to Bierko. Buchanan chafes against the new chain of command as Homeland Security prepares to take over CTU operations. Aaron receives a request for a secret meeting from Wayne Palmer, as Logan implements martial law in L.A.

Since Jack Bauer has been pulled from his senate sub-committee hearing to assist with the deadly domestic threat and the investigation of former colleague Tony Almeida, his new undefined role is to help secure the nation. Meanwhile, President Allison Taylor presides over the escalating time-sensitive dilemmas linked to the unrest in Sangala. Chloe O’Brian and Bill Buchanan are on hand this season as well as FBI Agents Renee Walker, Larry Moss, Janis Gold and Sean Hillinger to cope with the unthinkable events

Chloe is unexpectedly thrust into fieldwork when a woman reports that her boyfriend may be part of the terrorist conspiracy. Jack and Curtis find their latest efforts to trap Marwan thwarted by the Secret Service, who have orders to arrest Jack for insubordination. Mike calls on ex-President David Palmer for help as Logan continues to display a lack of leadership.

CTU raids Marwan's hideout, but he manages to slip through their fingers. Luckily, Jack locates a lead that may help him identify Marwan's next target. Tony becomes suspicious of Michelle's personal life, while Audrey reunites with Paul and learns the extent of his injuries. Anderson closes in on his quarry, as President Keeler searches for words that will comfort the American public.

Jack and Michelle question Syed Ali, who claims that the audio recordings are false. Palmer prepares to wage war against the three countries who were involved in the nuclear strike. Kim gets caught in a hostage situation. Jack is contacted by a man who wants to exchange information for Kate Warner.

Jack and Chase race against time to capture Saunders before the deadline, while Chappelle plans an escape. Michelle begins a frantic search when she learns that an infected hotel guest may have slipped through her fingers.

Jack enlists the help of an autistic man in the search for Gredenko, and Sandra Palmer makes a fateful decision.

Jack and Tony are able to trace Dina's location, but Behrooz slips through their fingers. Dina demands a full pardon for her son in exchange for information on the override device. Edgar wrestles with his emotions when his mother is trapped in the path of the nuclear fall-out. Behrooz turns to his uncle for help, but Navi closes in on him before he can get away.

Palmer's cabinet invokes the 25th Amendment in an attempt to remove him from power. They place him on trial for his extreme actions during the nuclear bomb threat. Jack and Michelle work against the clock to prove that the evidence against the Middle East is false.

Jack tries to undermine Eddie's mission to bomb CTU while George investigates intel leading him to the site of the nuclear bomb's construction and Kim tries to make contact with her father by heading for CTU headquarters.