In the Line of Duty 5: Middle Man - 皇家師姐之中間人 (1990)

• Movie: In the Line of Duty 5: Middle Man
• Chinese: 皇家師姐之中間人
• Director: Cha Chuen-Yee
• Producer: Stephen Shin Gei-Yin
• Cinematographer: Cheng Siu-Keung
• Release Date: 1990
• Runtime: 130 Minutes
• Language: Cantonese
• Country: Hong Kong 
• Subtitles : English | Chinese
• Cast: Cynthia Khan, David Wu Dai-Wai, Alvina Kong Yan-Yin, Lo Lieh, Goo Goon-Chung, Billy Chow Bei-Lei, Chris Lee Kin-Sang, Steve Tartalia, Wong Wai, Lau Kong, Vincent Lyn, Jackie Lui Chung-Yin, Milk Hoh Ho-Yuen, Chau Chi-Chung, Wong Gwong-Fai, Mark King, Joseph Bryan Baker, John Ladalski, Kenny Wong Tak-Ban