Cast & crew
A Deadly Secret (1980)
Directed by Mou Tun-Fei Written by Ni Kuang
Cast
| Ng Yuen-Jun | Ti-Koyo |
| Jason Pai Piao | Dien |
| Elliot Ngok Wah | Tui |
| Shih Szu | Wa |
| Kwan Fung | Mui |
| Wong Ching-Ho | Martial |
| Liu Lai-Ling | Fong |
| Benny Lai Keung-Kuen | Black Student |
| Dick Wei | Kwai |
| Walter Tso Tat-Wah | He-Man |
| Wai Wang | Ping |
| Tong Kam-Tong | Cheung |
Crew
| Run Run Shaw | Producer |
| Mona Fong Yat-Wah | Producer |
| Mou Tun-Fei | Director |
| Ni Kuang | Writer |
| Chiang Hsing-Lung | Editor |
| Louis Cha | Novel |