In the Line of Duty 4
| MPAA Rating: | R |
| Genre: | Action, Crime |
| Country: | Hong Kong |
| Produced By: | Norman Chan, Stephen Shin, Dickson Poon |
| Directed By: | Woo-Ping Yuen |
| Written By: | Kwong Kim Yip, Wing-Fai Wong, Chi-Sing Cheung |
| Cast: | Man-Kei Yiu, Jim James, Wing Cho, Jing-Hung Kwok, John Salvitti, Kai Chi Liu, Chi-Mun Ho, Paul Wong, Stephan Berwick, Gei Shun Wai, Farid Dordar, Shun-Yee Yuen, Michael Woods, Farlie Ruth Kordica, Kwok-Kin Ng, Yat Chor Yuen, Cynthia Khan, Donnie Yen, Michael Wong, Tin Hung Yee, Chiao Chiao, Tim Hyland, Simon Broad, Eddie Maher, Siu Cheung, Blaine Lamoureux |
| In Theaters: | Jul 21, 1989 |
| Runtime: | 1 hour 34 minutes |
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