About Line Walker
Line Walker is a Hong Kong crime drama produced by TVB and first broadcast in 2014. Created and directed by Jazz Boon, the series follows a unit of deep-cover police officers whose identities were lost when the only record of their assignments was compromised. A senior officer becomes determined to track down these forgotten agents, reconnect them to the force, and bring them safely back from the criminal organizations they have spent years infiltrating.
The story centers on the bond between handlers and the operatives they place inside organized crime, examining the psychological cost of living a double life for so long that the line between duty and loyalty begins to blur. As the unit pieces together who among their contacts may still be working undercover, suspicion, mistaken identity, and shifting allegiances drive a tense, character-led investigation rather than relying on spectacle. The drama keeps its focus on trust, memory, and the question of who a person truly is when their cover becomes their life.
Line Walker was one of TVB's most talked-about dramas of its year, praised for its ensemble cast and its twist-driven plotting. Its popularity helped spark a wider franchise, including later television and film projects built around the undercover-police premise. The series is often cited as a high point for the modern TVB crime genre and remains a frequent reference point for fans of Hong Kong police dramas.
