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The cast of Season 5.

Season 5 debuted in the United States on Monday, January 16, 2006 on Fox, and debuted in the United Kingdom on Sunday, February 12, 2006 on Sky One.

Season Overview

Eighteen months after faking his death, Jack Bauer is living under the alias Frank Flynn and renting a room from a single mother and her son. Soon after Former President David Palmer is assassinated, Jack gets a frantic call for help from Chloe O'Brian and he realizes that the four people who know he is still alive are being targeted. Jack returns to CTU Los Angeles to figure out who is really behind the assassination of David Palmer, and uncovers a plot involving deadly nerve gas and people inside President Logan's administration. As Jack searches for the people involved and tries to stop the nerve gas from being released, he discovers that the conspiracy goes higher than anyone could have ever imagined.

Closer to Days 1-3 in format than Day 4, Day 5 can be split into 3 acts:

1. In the first act, Jack is framed for a series of murders. He heads to LA to clear his name when a hostage situation erupts.

2. Russian separatists obtain 20 canisters of highly lethal nerve gas, and begin releasing the gas in public locations.

3. The high-ranking mastermind of the day's events is revealed and Jack must bring them down to avoid national catastrophe.

Major Subplots


Season 5 had the highest audience ratings so far. The show improved its overall audience by 14 percent over its fourth season and by 12 percent in the age 18-49 demographic, averaging a total audience of 13.8 millions, therefore ranking #23 for the 2005-2006 Nielsen TV Season. Even more important, "24" performed particulary well in the key age 18-49 demographic ranking #15 with an average rating of 5.7/13.

Due to the high ratings, Fox decided to re-air Season 5 on Fridays during the summer, showing two episodes per week. However, ratings for the repeated episodes were not as high as was expected, so Fox discontinued them.

Main Cast


Picture Time Episode Number Production Code Original Airdate
JackChloeseason5prequel.jpg Season 5 Prequel Season 4 DVD
A year after the events of Day 4, Jack meets Chloe in a remote area of Chicago and learns that Chloe’s computer files were hacked and that someone else knows that he’s still alive. An unidentified man chases Jack, but Jack is able to escape. Then Day 5 begins...
Assassinated.jpg 7:00am-8:00am 97 5AFF01 January 15, 2006
Eighteen months after faking his death, Jack Bauer, who's assumed the name Frank Flynn, returns to Los Angeles after the four people who know he's alive come under attack. President Logan prepares to sign an important arms treaty with the President of Russia. First Lady Martha Logan is disturbed about the morning's events. Jack learns that he's being framed for the attacks.
Jackalive.jpg 8:00am-9:00am 98 5AFF02 January 15, 2006
Jack and Chloe infiltrate Wayne Palmer's penthouse at the hotel in hopes of finding a lead. Martha tries to convince her husband that she had a conversation with Palmer the night before. Cummings' ally — Nathanson — launches the next phase of his plan at the Ontario International Airport.
Jacksurrenders.jpg 9:00am-10:00am 99 5AFF03 January 16, 2006
Jack conceals himself in the airport hangar, surveying the Russian separatists and feeding information to Curtis and his assault team. The terrorists continue to execute hostages in an attempt to make President Logan give in to their demands to nullify the treaty. Martha discovers that all the traces of her conversation with David Palmer might not have been erased.
S5e04main.jpg 10:00am-11:00am 100 5AFF04 January 16. 2006
Jack is captured by the terrorists, who use Derek as leverage to force him to compromise CTU's assault team. Logan refuses to give in to the terrorists' demands. However, the airport incident turns out to be a diversionary cover for an arms deal. Martha continues to try convince her husband that the phone call was real, but Walt interferes. A new representative from Division — Lynn McGill — arrives at CTU and begins to undermine Buchanan's authority.
S5ep5.jpg 11:00am-12:00pm 101 5AFF05 January 23, 2006
Jack returns to CTU and has a emotional reunion with Audrey, while Curtis tracks the Russians and the stolen military-grade Sentox nerve gas. Cummings sends in an assassin to silence Jack. Chloe discovers that Spenser has an agenda at CTU. Walt convinces Logan to send Martha to be institutionalized when she tells them of the attacks against her.
S5ep6.jpg 12:00pm-1:00pm 102 5AFF06 January 30, 2006
Jack contacts Mike Novick and asks for a secret meeting in hopes of gathering evidence against Cummings. Martha begs Aaron for help while Walt thinks that he is forcing Logan into aiding him with his complicity with the terrorists. Buchanan butts heads with Lynn over a decision to violate the President's orders, while the Russian seperatists attempt to escape with the nerve gas.
GunonCal.jpg 1:00pm-2:00pm 103 5AFF07 February 6, 2006
Jack Bauer finds a connection to the terrorists, but his connection has problems of his own. Charles Logan, Mike Novick and Martha Logan discuss the best way to handle the Walt Cummings situation. Lynn McGill has personal problems that draw him away from work and Chloe O'Brian is forced to work with Spenser Wolff again.
S5ep8.jpg 2:00pm-3:00pm 104 5AFF08 February 13, 2006
Jack poses as Rossler, the programmer, and manages to trace one of the Sentox nerve gas canisters, but he goes against the President's orders when the terrorists target a shopping mall. President Logan and Martha argue when she learns that he intends to cover up the real reason for Walt Cummings's "suicide".
S5ep9.jpg 3:00pm-4:00pm 105 5AFF09 February 20, 2006
Vladimir Bierko kills Erwich. Jack obtains a data chip from Nathanson, Cummings' middleman. Chloe finds the name Omicron Corporation on the chip. Lynn figures out that everyone at CTU is working behind his back and has Buchanan taken into custody. Logan decides to give Bierko the route to the Suvarovs' motorcade. Martha jumps in their car at the last moment.
S5e10f10.jpg 4:00pm-5:00pm 106 5AFF10 February 27, 2006
Jack meets Christopher Henderson at Omicron and almost gets blown up. Audrey convinces Curtis to have Lynn held on the grounds that he is mentally unfit to run CTU. Bierko attacks the Suvarovs, but Aaron Pierce saves the day.
GunOnKnee.jpg 5:00pm-6:00pm 107 5AFF11 March 6, 2006
Jack Bauer interrogates Henderson's wife, Lynn tries to get his keycard back as terrorists plan to release the nerve gas in a hospital. Tony wakes up and asks about Michelle's fate. Meanwhile the First Lady tries to avoid the President.
ChloeWatches.jpg 6:00pm-7:00pm 108 5AFF12 March 6, 2006
Jack Bauer has to deal with his daughter's return, a former mentor who has information he needs, and a terrorist attack on CTU. Meanwhile, President Logan debates Martial Law with Vice President Hal Gardner.
TonyHenderson.jpg 7:00pm-8:00pm 109 5AFF13 March 13, 2006
Jack Bauer and the rest of CTU take action to protect the remaining isolated areas and plan escape tactics. Chloe wrestles with her grief over Edgar's death, while Tony contemplates revenge on Henderson. Martha bolsters Logan's judgment as he face faces political pressure from Hal Gardner.
WaynePalmerHit.jpg 8:00pm-9:00pm 110 5AFF14 March 20, 2006
CTU investigates a new lead on Bierko, but finds resistance from German intelligence officer Theo Stoller. Martha Logan is skeptical of the administration's move for a curfew. New Homeland Security officials attempt to change operating protocol involving Chloe O'Brian and Bill Buchanan. Meanwhile, Wayne Palmer has some information he has to get to Aaron Pierce that someone doesn't want getting out.
S5e15main.jpg 9:00pm-10:00pm 111 5AFF15 March 27, 2006
Jack is forced to interrogate Audrey when he learned that she might be connected to Bierko and the terrorists. Wayne Palmer and Aaron Pierce flee from armed men who have orders from Christopher Henderson to kill them. Vladimir Bierko and his men execute the next phase of attacks by targeting a gas company and releasing the Sentox gas throughout Los Angeles.
S5e16main.jpg 10:00pm-11:00pm 112 5AFF16 April 3, 2006
Jack teams up with Wayne Palmer to help David Palmer's source in the White House: Martha Logan's aide, Evelyn Martin. Hal Gardner has a run in with Wayne, and Jack suspects the Vice President might be behind the days events. Audrey Raines goes along with a plan to remove Bill Buchanan from power in order to keep Chloe O'Brian at CTU to assist Jack.
S5e17f18.jpg 11:00pm-12:00am 113 5AFF17 April 10, 2006
New discoveries regarding the day's horrific events keep Jack Bauer away from CTU, whose agenda Department of Homeland Security is ordered to reprioritize. Chloe O'Brian and Audrey Raines team together to assist with field operations and the investigation takes a unexpected turn.
AudreyBleeding.jpg 12:00am-1:00am 114 5AFF18 April 17, 2006
Although President Charles Logan claims the country is no longer under attack, marital law is still enforced and CTU remains under intense pressure to find the remaining fugitives. Meanwhile, Jack Bauer, Audrey Raines and Secretary of Defense James Heller reunite for a pivotal meeting.
S5e19f03.jpg 1:00am-2:00am 115 5AFF19 April 24, 2006
While Jack comes closer to obtaining the recording from Christopher Henderson, tensions at the President's retreat escalate as Martha grows suspicious of her husband. Meanwhile, Heller and Curtis help in the struggle against Henderson. A surprising new ally joins Buchanan and O'Brian as they continue to assist Jack, and a new antagonist is revealed.
S5e20f03.jpg 2:00am-3:00am 116 5AFF20 May 1, 2006
Although Karen wishes to help Buchanan, he is still taken into CTU to maintain the cover while Chloe escapes. Meanwhile, Jack hijacks a plane in search for the recording that Henderson handed off. At the retreat, Martha grows increasingly unstable, causing further dispute between Logan and Mike. Graham continues to manipulate Logan into taking drastic measures.
S5e21f06.jpg 3:00am-4:00am 117 5AFF21 May 8, 2006
With Graham's help, Logan decides to launch one final attempt to secure the recording that implicates him in the conspiracy surrounding the day's events. At CTU, several agents begin working with Jack, Chloe, and Buchanan. Tensions continue to rise in Logan's retreat as the President contemplates suicide. Meanwhile, Bierko is transported to another facility, and Miles attempts to further his career by making a key decision.
S5e22f05.jpg 4:00am-5:00am 118 5AFF22 May 15, 2006
Jack, Chloe, Bill, and Karen realize that the recording was erased by Miles. However, CTU is soon forced to switch tracks and focus on a new threat: Bierko escaped, and he plans to seize another powerful weapon. With the new threat quickly approaching, Jack must use Christopher Henderson in a delicate sting operation. Meanwhile, the drama at the retreat turns deadly.
S5e23main.jpg 5:00am-6:00am 119 5AFF23 May 22, 2006
While Jack and Henderson secure a missile submarine seized by Bierko, Martha and Aaron form an alliance with Mike Novick. Meanwhile, Logan prepares to leave for Palmer's sendoff, which Jack exploits to his advantage after he settles his other personal vendetta against Henderson.
S5e24main.jpg 6:00am-7:00am 120 5AFF24 May 22, 2006
Mike, Aaron, Martha, and Jack conspire to kidnap President Logan as part of a plan to secure a confession about the original conspiracy behind the day's events. When Jack's gambit fails, Martha and Chloe initiate a back-up plan to incriminate the President. Meanwhile, Jack's plan to disappear again is put at risk when someone from his past re-enters the picture.

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Season 4
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Season 6
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Day 5 prequel
Day 5
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Day 6
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