Long Arm of the Law IV: Underground Express (1990)
The final entry in Michael and Johnny Mak's Long Arm of the Law series, Underground Express once again tells a story of gangsters versus police, focusing on the difference between how both factions act depending if they're coming from Hong Kong or Mainland China.
- Country : Hong Kong
- Genre : Action, Crime
- Studio : Johnny Mak Production Co. Ltd.
- Director : Michael Mak
- Cast : Elvis Tsui Kam-Kong, Chan Ging, Ronny Ching Siu-Lung, Frankie Chin Chi-Leung, Jacqueline Ng Suet-Man, Kan Sek-Ming