In the Line of Duty 4 - 皇家師姐IV直擊證人 (1989)

• Movie: In the Line of Duty 4
• Chinese: 皇家師姐IV直擊證人
• Director: Yuen Wo-Ping
• Producer: Stephen Shin Gei-Yin
• Cinematographer: Au Gaam-Hung
• Release Date: 1989
• Runtime: 134 Minutes
• Language: Cantonese
• Country: Hong Kong 
• Subtitles : English | Chinese
• Cast: Cynthia Khan, Michael Wong Man-Tak, Donnie Yen Ji-Dan, Yuen Yat-Choh, Lisa Chiao Chiao, Liu Kai-Chi, Wai Gei-Shun, Yuen Shun-Yi, Michael Woods, John Salvitti, Stephen Berwick, Fairlie Ruth Kordick, Paul Wong Kwan, Eddie Maher, Cho Wing, Yee Tin-Hung, Yiu Man-Gei, Blaine Camoureux, Farid Dordar, David Petersen