![Long Arm of the Law IV: Underground Express](https://image.tmdb.org/t/p/original//6hKNkIPCWhttKxCCJUVPXpmzrbB.jpg)
![Long Arm of the Law IV: Underground Express](https://image.tmdb.org/t/p/w200//1Zj74OyuaKbqirQWp2QS21vzJFX.jpg)
Long Arm of the Law IV: Underground Express
1 hour 40 minutes1990-06-05
7.8
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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.