| english title | Royal Warriors |
| original title | 皇家戰士 |
| aka | In the Line of Duty / Police Assassin / Police Action |
| french title | Le Sens du Devoir |
| year | 1986 |
| country | Hong-Kong |
| director | David CHUNG Chi-Man - 鍾志文 | |
| actor | Michelle YEOH - 楊紫瓊 | Michelle Yip |
| LAU Siu-Ming | ||
| Dennis CHAN Kwok-San | ||
| WOO Fung | ||
| LEE Sau Kei | ||
| Kenneth TSANG Kong - 曾江 | ||
| KAM Hing-Yin | ||
| Chan KING | ||
| Eddie MAHER | ||
| HUI Siu-Hung - 許紹雄 | ||
| Blacky KO Sau-Leung - 柯受良 | ||
| SANADA Hiroyuki | Peter Yamamoto | |
| Michael WONG Man-Tak - 王敏德 | Michael Wong | |
| Michael CHAN Wai-Man - 陳惠敏 | Harvey Lee | |
| BAI Ying | Le dernier tueur | |
| Paul CHIANG | ||
| Helena LAW Lan - 羅蘭 | ||
| SIU Tak Foo | ||
| producer | John SHAM - 岑健勳 | |
| action director | MANG Hoi | |
| composer | Romeo DIAZ | |
| scriptwriter | TSANG Kan-Cheung |
| genres | action kung-fu |
| duration | 1h33 |
| shooting studio | D&B |
| classification | Hong-Kong:  |
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