The sequel to Thou Shalt Not Swear. Chow reteams with Lau to investigate a murder and his wife is a suspect this time. All the murder victims seem to have cheated on their wives.
| Actor | Role |
|---|---|
 Lau Ching-WanInspector Lau | Inspector Lau |
 Michael Chow Man-KinInspector Chow | Inspector Chow |
 Ivy Leung Si-ManMrs. Chow | Mrs. Chow |
 Yu RongguangChuen-Sun | Chuen-Sun |
| JJoyce Geung YungWong Man Man / Ching Ching | Wong Man Man / Ching Ching |
 Jamie Luk Kim-MingDetective Blacky | Detective Blacky |
 Pak Man-BiuUncle Wong | Uncle Wong |
 Tats LauInspector Chung | Inspector Chung |
 Helena Law LanDr. Lung | Dr. Lung |
 Joey Leung Wing-ChungThief witness | Thief witness |
 William Duen Wai-LunVictim in Bathroom | Victim in Bathroom |
 Billy Ching Sau-YatMan who checks ID | Man who checks ID |
 Lam Chiu-WingNot listed | Not listed |
 Dennis Chan Kwok-SanNot listed | Not listed |
 Yoyo Mung Ka-WaiNot listed | Not listed |
| RRico Chung Kai-CheongNot listed | Not listed |
 Wellson Chin Sing-WaiNot listed | Not listed |