Hong Kong detectives Chau and Beethoven join forces with Mr. Boo in a daring mission involving a jewelry heist and a museum caper.
| Actor | Role |
|---|---|
 Michael Hui Koon-ManMr. Boo | Mr. Boo |
 Richard Ng Yiu-HonChau | Chau |
 John Shum Kin-FunBeethoven | Beethoven |
 Terry HuNot listed | Not listed |
 Philip Chan Yan-KinInspector Chan | Inspector Chan |
 Stuart Yung Sai-KitCharlie Yeung | Charlie Yeung |
 Dickson Poon Dik-SangNot listed | Not listed |
 Deanie IpAnna | Anna |
 Peter Chan LungRobber | Robber |
 Ben Lam Kwok-BunNot listed | Not listed |
 Wu MaBank Robber | Bank Robber |
 Natalis Chan Pak-CheungPoliceman | Policeman |
 Chin Ka-LokNot listed | Not listed |
 Chan Chi-FaiNot listed | Not listed |
 Teddy Yip Wing-ChoNot listed | Not listed |
 Paul Chung FatNot listed | Not listed |
 Dennis Chan Kwok-SanNot listed | Not listed |
 Hui Ying-SauNot listed | Not listed |
 Leong Po-ChihNot listed | Not listed |
 Johnny Cheung WaNot listed | Not listed |
 Yu Miu-LinNot listed | Not listed |