Martial art film standout Liang Chia-jen brings the same animalistic intensity from his early heroic bloodshed films to his Danger Has Two Faces tough, ex-cop character now relegated to becoming a pet store owner. The stern Police Superintendent Liu played by Chu Chiang sets the stage for his later role in John Woo's The Killer while new comer Fei Hsiang must do Serpico-like things to find out which cop is paid for by the mob.
| Actor | Role |
|---|---|
 Bryan LeungJin Zhi Jiang | Jin Zhi Jiang |
 Paul Chu KongSuperintendent Lau Chak-San | Superintendent Lau Chak-San |
 Kris PhillipsInspector Bobby Zhou Fu Xiang | Inspector Bobby Zhou Fu Xiang |
 Kirk Wong Chi-KeungSergeant Sam Liang | Sergeant Sam Liang |
 Charlie Cho Cha-LeeMan impersonating policeman | Man impersonating policeman |
 Goo Ga-LauJenny | Jenny |
 Lam Fai-WongRobber | Robber |
| LLeung Siu-WahRobber | Robber |
 Cheng Kei-YingRobber | Robber |
 Lam Kai-WingRobber | Robber |
| CCheung Ming-ManMin | Min |
| LLiu Lai-LingLing | Ling |
 Chan Chik-WaiGuai | Guai |
 Pamela PakPet shop customer | Pet shop customer |
 Paul Che Biu-LawArmoured car driver | Armoured car driver |
 Yuen Ling-ToArmoured car guard | Armoured car guard |
 Kei Ho-ChiuRobber | Robber |
 Wong Kim-FungRobber who fights with Bobby | Robber who fights with Bobby |
 Gam BiuNot listed | Not listed |
 David Lam WaiNot listed | Not listed |