by the police in episode 26. Lap Ching Jin Au-Yeung portrays Yeung Lap-ching (楊立青), known as Lap Ching (蠟青; lit. Asphalt), an undercover trainee mentored by Laughing, who is indebted to Mok Yat Lit. Vicky Mung Mandy Wong portrays Vicky / Mung Sam-ling (蒙心凌), known as Ah Mung (阿檬), an undercover trainee mentored by Madam Jo. Young Master Kit Daniel Chau portrays Suen Siu-kit (孙少杰), known as Young Master Kit (杰少), an UC trainee mentored by Laughing, and Fong Chun-Long's younger twin brother. He goes undercover on a mission assigned by Laughing in episode 14, but his identity was revealed when his ear piece was discovered by Michael So. He was injected with poisonous amounts of drugs which led to paralysis by Michael So in episode 15, but he completely recovers and resumes police office work in episode 29. Bubble Bella Lam portrays Lam Po-tim (林寶甜), known as Bubble, an undercover trainee mentored by Laughing. T Two Ronald Law portrays Kwok Ting-tin (郭定天), known as T Two, an UC trainee mentored by Madam Jo. He was later found to be a triad mole placed within CIB by Mok Yat-lit, who was his godfather. He was arrested and dismissed by the police in episode 25. Yee Fung triad organisation Mok Yat-lit Cheung Kwok-keung portrays Mok Yat-lit (莫一烈), the leader of the Yee Fung triad. He is also the cousin-in-law of Harry Kung. He was killed under orders from Michael So and another triad senior, Choy Hing Fat in episode 23, when Michael tries to seize the power and influence he held within Yee Fung. Lat Keung Ben Wong portrays Tang Kwok-ban (鄧國彬), better known as Lat Keung (辣薑; lit. Spicy Ginger), one of Mok Yat-Lit's best assistants in the triad. He is later revealed to be an UC cop supervised by Harry Kung, but later renegades the latter. He was charged for setting fire to Yee Fung's red oil yard, almost killing Laughing, but was found not guilty of attempted murder in episode 23. He was killed by the police in episode 29 in a shootout. Michael So Bosco Wong portrays Michael So / So Sing-pak (蘇星柏), better known as Bai Co (跛Co; lit. Crippled Co) or Wai Co (威Co; lit. Dignified Co), Laughing's informant. Michael grew up in a privileged household and went to a prestigious private school. Before Michael finished high school, his father's business failed and his father