Christopher Lap-Key Sun Director, Screenwriter Gregory Wong Nelson Yu Actor Justin Cheung Jack Lui Man Chik Actor Kwong Leung Wong Szeto Kwong Actor Kai Chi Liu Uncle Dat Actor Babyjohn Choi Ng Chi Keung, Roach Actor Jessy Li May Ning Mei Yiu Actor On-On Yu Nelson's mother Actor Elvis Tsui Chief Warden Tsang Actor Siu Lun Ng Screenwriter Toni Shum Screenwriter Mark Wu Screenwriter Wing Lun Chan Producer Albert Wing-Ho Lee Producer Alvin Chow Executive Producer Cheng Siu-Keung Cinematographer, Film Editing