Cast & crew
Security Unlimited (1981)
Directed by Michael Hui Koon-Man Written by Sam Hui, Michael Hui Koon-Man, Thomas Tang Wai-Hung, David Ip Foo-Keung
Cast
| Michael Hui Koon-Man | Captain Chow Sai Cheong |
| Ricky Hui Koon-Ying | Bruce Tang |
| Marylinn Wong Cho-Shut | Chun |
| Chan Sing | Robber Gang Chief |
| Lee Hoi-Sang | Robber with Pump-gun |
| David Cheung | Robber with Harpoon |
| Yue Tau-Wan | Cross-eyed Robber |
| Kobe Wong Kam-Bo | Robber Knowing Melody |
| Sam Hui | Lieutenant Sam |
| Stanley Fung Shui-Fan | Ah Fan |
| Hui Sai-Cheong | Wong Security boss |
| Ray Cordeiro | Horse Race Trickster |
| Joe Junior | Sniper with Ice Bullets |
| Tsang Choh-Lam | Fake Corpse |
| Lau Hak-Suen | Taipan Law |
| Huang Man | Taipan Law's Wife |
| Lok Shut | Ship Party Moderator |
| Wong Chik-Sam | Sergeant |
| Au Shu-Cham | Thief in factory |
| Fung Fung | Driving Instructor |
| Tang Mei-Mei | |
| Hung Leung-Sek | Race Course Commentator |
| Tang Shih | Robbed Bank Employee |
| Albert Cheung Miu-Hau | Kidney Thief |
| Maria Chung Wai-Bing | Ship Party Guest |
| Shui-Jan Fung | |
| Tse Hon-San | |
| Bill Tung Biu | Race Course Commentator |
| Man Ngai-Tik |
Crew
| Sam Hui | Writer |
| Michael Hui Koon-Man | Director |
| Michael Hui Koon-Man | Writer |
| Raymond Chow | Producer |
| Michael Hui Koon-Man | Story |
| Sam Hui | Original Music Composer |
| Tom Lau Moon-Tong | Director of Photography |
| Thomas Tang Wai-Hung | Story |
| David Ip Foo-Keung | Story |
| Sam Hui | Story |