

77 minSeason 1 • Episode 16
Latest“Undercover” depicts the story of Han Jung Hyun, who has been hiding his identity for a long time, and Choi Yeon Soo, a human rights lawyer who becomes the first head of the Senior Civil Servant Corruption Investigations Unit to fight for justice.
Acting
Ji Jin-hee's micro-expressions carry 20 years of lies.
Direction
Dual timelines that actually enhance, not confuse.
Writing
Makes bureaucracy as tense as any car chase.
Trivia, insights & behind the scenes
Based on real UK undercover officer scandal where police infiltrated activist groups, then abandoned families—Korean adaptation shifts focus to institutional accountability rather than individual pathology.
The age-gap casting mirrors the show's themes: Yeon Woo-jin and Han Seon-hwa play younger selves with different energy than their older counterparts, suggesting the characters were literally different people before life hollowed them out.