The details of undercover police officers are deleted from a police database and a senior officer is left struggling to know who are the undercover officers and who are the criminals.
Blue
Shiu Chi-Long
Q-Sir / Inspector Q
Ding Siu-Ka
Foon Hei-Gor
Police Superintendent
Triad Member
Assassin
Tung Pak-Ho
Siu Ying, Blue's Bodyguard
1988
1990
2004
1996
1991
2018
2021
1955
2000
2006
1976
2017
2005
1974
2008
2019
2016
2024
2009
2022
2012
2023
2015
2014
2020
