This episode marks the first appearance of Cheng Zhi (played by Tzi Ma), who becomes one of Jack's longest-running and most significant adversaries throughout the series.

In the 21st episode of Season 4, titled "Day 4: 3:00 a.m. – 4:00 a.m.," the tension reaches a breaking point as the domestic threat of a nuclear launch converges with a major international diplomatic crisis. Plot Summary: Domestic and International Crises

The episode centers on two parallel conflicts: the physical hunt for terrorist leader and the political fallout from a raid on the Chinese Consulate .

The two continue to manage the tactical operations at CTU, with Michelle struggling to balance the professional necessity of the mission against the personal tragedy involving Paul and Audrey. Critical and Fan Reception

The illegal raid on the Chinese Consulate in the previous hour results in a major international incident. Cheng Zhi , the consulate's head of security, arrives at CTU with evidence—a surveillance photo of an unmasked CTU agent—proving American involvement.

Former President David Palmer and current President Charles Logan clash over how to handle the Chinese. Palmer advocates for "plausible deniability" and moving forward with the mission, while a panicked Logan worries about the fragile relationship with China and accuses Palmer of undermining him. Key Character Developments

Critics and viewers often highlight this episode for its relentless pacing and high-stakes "cliffhanger" ending.

Watch 24 4x21 1 May 2026

This episode marks the first appearance of Cheng Zhi (played by Tzi Ma), who becomes one of Jack's longest-running and most significant adversaries throughout the series.

In the 21st episode of Season 4, titled "Day 4: 3:00 a.m. – 4:00 a.m.," the tension reaches a breaking point as the domestic threat of a nuclear launch converges with a major international diplomatic crisis. Plot Summary: Domestic and International Crises Watch 24 4x21 1

The episode centers on two parallel conflicts: the physical hunt for terrorist leader and the political fallout from a raid on the Chinese Consulate . This episode marks the first appearance of Cheng

The two continue to manage the tactical operations at CTU, with Michelle struggling to balance the professional necessity of the mission against the personal tragedy involving Paul and Audrey. Critical and Fan Reception Plot Summary: Domestic and International Crises The episode

The illegal raid on the Chinese Consulate in the previous hour results in a major international incident. Cheng Zhi , the consulate's head of security, arrives at CTU with evidence—a surveillance photo of an unmasked CTU agent—proving American involvement.

Former President David Palmer and current President Charles Logan clash over how to handle the Chinese. Palmer advocates for "plausible deniability" and moving forward with the mission, while a panicked Logan worries about the fragile relationship with China and accuses Palmer of undermining him. Key Character Developments

Critics and viewers often highlight this episode for its relentless pacing and high-stakes "cliffhanger" ending.