The penultimate hour of (Episode 23, "5:00 AM – 6:00 AM") is widely regarded by fans and critics as a masterclass in high-stakes television, serving as the first half of a pulse-pounding two-hour season finale. The Final Strike on Bierko
Once the missile threat is neutralized, Jack finally settles the score with Henderson. After Henderson attempts to shoot Jack with an unloaded pistol—a final test of Jack's resolve—Jack executes him in cold blood. Jack justifies the killing by citing Henderson's direct responsibility for the deaths of American icons David Palmer, Tony Almeida, and Michelle Dessler earlier in the season.
The episode begins with Jack Bauer in a race against time to stop Vladimir Bierko, who has hijacked a Russian submarine and intends to launch twelve multiple-warhead missiles at American soil. Jack forms an uneasy alliance with his former mentor-turned-villain, Christopher Henderson, to infiltrate the sub. In a brutal final confrontation, Jack kills Bierko by snapping his neck while the terrorist is locked in a scissor hold. 24 - Season 5 Episode 23
First Lady Martha Logan plays a critical role, using her influence to stall the President long enough for Jack to gain access to the helicopter, Marine One. Critical Impact & Reception
Mike Novick and Aaron Pierce assist Jack from within the administration, while Chloe O'Brian and her ex-husband, Morris, provide technical support to help Jack infiltrate the presidential detail. The penultimate hour of (Episode 23, "5:00 AM
The episode is praised for its relentless speed and "masterclass in suspense," particularly during the close-quarters submarine sequences.
Reviewers on IMDb highlighted Sutherland's "riveting" performance, capturing Jack's descent from a professional operative into a man driven by pure, vengeful determination. Jack justifies the killing by citing Henderson's direct
Jack informs CTU that he is going rogue to take down the President.