Season 5 · 24 episodes
The Russian and US Presidents are set to sign an anti-terror treaty when assassinations rock Los Angeles, a call from a distressed Chloe forces Jack into action and President Logan's wife believes there may be a conspiracy.
Jack and Chloe infiltrate Wayne Palmer's penthouse where David Palmer was assassinated, in the hopes of finding a clue to his murder. Jack convinces Wayne to cooperate and finds some information in Palmer's memoirs that leads him to the ai…
Jack conceals himself inside the airport hanger and surveys the Russian separatists, feeding information to Curtis and his assault team. The terrorists begin executing hostages in an attempt to make Logan cave into their demands. Marth…
Jack is captured by the terrorists, who use Derek as leverage to force him to compromise CTU's assault operation. Logan refuses to give into the terrorist demands as the time of the co-signing of the treaty draws near. Martha tries to tel…
Jack returns to CTU and has an emotional reunion with Audrey, while Curtis tracks the Russians and the stolen nerve gas. Walt sends in a hit man to silence Jack. Chloe discovers that Spencer has his own agenda at CTU. Walt convinces …
Jack contacts Mike and asks for a secret meeting in hopes of gathering evidence against Walt. Martha begs Aaron for help, while a desperate Walt tries to force Logan to aid him in his complicity with the terrorists. Buchanan butts head…
Jack tracks down a man who has a connection to the terrorists. Logan is forced to grant him immunity in exchange for information on their whereabouts. Mike and Martha argue over Logan's public response to Walt's involvement with the Russ…
Jack poses as Rossler and manages to trace one of the canisters of nerve gas, but he goes against orders from the president when the terrorists target a shopping mall. Logan and Martha quarrel when she learns of her husband's intention t…
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…
Logan wrestles with his conscience when he learns that Martha is riding in the motorcade with the Suvarovs. Audrey convinces Curtis to take action as Lynn continues to abuse his authority. Jack learns that an ex CTU agent, Christopher …
Jack interrogates Henderson's wife about her husband's connection to the terrorists. Lynn begs his sister to return his stolen keycard, while Tony regains consciousness and learns of Michelle's fate. Martha gives Logan the cold shoulde…
Jack takes Henderson to CTU for questioning. Once there, he faces an unhappy reunion with his daughter, Kim. Mike appeals to Martha for help as Logan faces pressure from his Vice-President to declare martial law on L.A. Lynn connects t…
Jack and Lynn must take action when they discover that the nerve gas is breaking through the protective seals that are keeping the CTU survivors alive. Chloe wrestles with her grief over Edgar's death, while Tony contemplates revenge aga…
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 …
Jack pushes Audrey for answers when evidence indicates that she may be involved with the terrorists. Wayne and Aaron flee from a group of gunmen who have orders from Henderson to kill them. Bierko and his men gain access to a natural g…
Jack and Wayne locate a source inside Logan's administration who has information on Palmer's assassination. But things get complicated when they learn that Henderson is using leverage to keep her silent. Audrey is forced to choose betwee…
Jack and Wayne locate a recording that definitively proves Logan's involvement in the terrorist conspiracy, but Henderson corners them in the hopes of destroying the incriminating tape. Logan tries to cover his tracks by issuing a warran…
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 Mar…
Jack captures Henderson and attempts to force him to hand over the recording, but Henderson targets Heller to buy himself more time. Logan confesses his involvement in Palmer's assassination to a distraught Martha. Miles traces Chloe to Bu…
After stowing away aboard the flight containing Henderson's contact and the incriminating recording, Jack finds himself having to deal with a pilot who refuses to cooperate. Martha begins to break down, and Mike becomes suspicious of what…
Jack searches for a safe place to land the plane when Logan gives orders to shoot it down. Hayes readies Bierko for a transfer to a secure facility, while Audrey receives some good news about her father. Logan becomes desperate as his plan…
Bierko escapes from the transport taking him to Division and uses his last canister of nerve gas for a surprise strike. Jack is forced to work with Henderson to find Bierko, but Henderson wants something in return. Logan takes drastic step…
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.
Jack takes his fight directly to the President as he attempts to force a confession from him that will prove his involvement in the day's events. Martha vents her hatred for her husband in front of the press as Logan gives a eulogy over Pa…