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Original run: 25 Aug 2014 – 2 Nov 2020
Country of origin: Hong Kong
Network: TVB HK
Total running time: 3 days 1 hour 30 minutes
Episode duration: 45 minutes
IMDB rating: 7.5 of 10 125
Line Walker follows the lives of undercover agents who are forced to live a life in secrecy. Without any estimation for them to return to their normal life, they are in constant fear of being discovered by the triads they are assigned to infiltrate. However. this time their lives are even more in danger when they discover that there is a mole within the police force.