Detective Investigation Files III
Detective Investigation Files III is a 1997 TVB production. It was a direct sequel to Detective Investigation Files II and the third installment in the Detective Investigation Files Series. The series ran for 40 episodes. Only Michael Tao, Joey Leung and Kenix Kwok returned to reprise their roles from the previous two installments. Louisa So, Amy Kwok, Joseph Lee and Sammi Cheng did not participate in this series; instead they were replaced by Margaret Chung, Law Koon Lan, Liu Kai-chi, Monica Chan and Winnie Yeung who portrayed new characters. This installment featured 10 cases.
Cast
[|Main Cast]
Cases
Case 1: The Other Jessie (Episode 1–5)
| Actor | Role | Description |
| Patrick Tam | Ho Chi Wan | Stephen、何醫生 Doctor Ning Qian Hua's boyfriend Murdered Tony and tried to murder Jessie Sentenced to death in episode 5 |
| Kenix Kwok | Ko Chit | See Main Cast |
| Kenix Kwok | Ning Qianhua | Vivian、阿倩 Originally from Guangzhou Ho Chi Wan's girlfriend Switched identities with Jessie and escaped to Hong Kong Sentenced to death in episode 5 |
| Eric Li | Law To Fung | Tony、羅醫生 Doctor Ho Chi Wan's friend Murdered by Ho Chi Wan in Beijing in episode 1 |
| Leung Kin Ping | Wang Haosheng | Blackmailed Gary Shek and Ning Qianhua Murdered by Ning Qianhua in Beijing in episode 1 |
| Lan Tianying | Lan Qing | Blackmail Gary Shek with Wang Haosheng Arrested in episode 2 |
| Emotion Cheung | Gary Shek | Blackmailed by Wang Haosheng and Lan Qing in Beijing |
| Wu Suqin | Fu Zhaohong | Cheung Tai Yung's friend Qiao Jin's mother |
| Tu Ling | Jiang Yang | 楊楊 Qiao Jin's wife |
| Ronnie Ching | Qiao Jin | Cheung Tai Yung's friend Fu Zhaohong's son Beijing's Gong An |
| Lu Wanfen | Ding Miao | 小苗 Beijing's Gong An |
| Shen Xingming | Zhu Jin | 小朱 Beijing's Gong An |
| Zheng Ruixiao | Chai Jun | 小柴 Beijing's Gong An |
| Melissa Ng | Yu Xiaoyu | Ko Chit's Lawyer |
| Wong Tai-wai | Zheng Guoping | Mainland Lawyer |
Case 2: Rape and Revenge (Episode 6–9)
Case 3: Unexpected Murderer (Episode 10–12)
Case 4: Love-hate Struggle (Episode 13–15)
Case 5: Butterfly Triggers (Episode 16–18)
Case 6: A Furious Affair (Episode 19–23)
Case 7: Now You See Me, Now You Don't (Episode 24–27)
Case 8: The Charlatan Murders (Episode 28–31)
Case 9: The Precious Stone (Episode 32–37)
Case 10: Backstage Manipulator (Episode 37–40)
| Actor | Role | Description |
| Kam Hing Yin | Jim Pak Hung | 詹Sir Chief Inspector Jim Chui Yi's father Manipulated the events of Case 5, 7 and 9 Arrested in episode 40 |
| Wilson Tsui | Wu Kin | Chak Wing Tin's good friend Killed Ching Sau On Kidnapped Fong Sung Yip and Lee Sze Lung Conspired with Chan Tai to extort Johnson Stabbed to death by Johnson |
| Yau Man Seng | Chan Tai | Wu Kin's partner in crime Killed Ching Sau On Kidnapped Fong Sung Yip and Lee Sze Lung Conspired with Wu Kin to extort Johnson Shot and killed by Johnson |
| Celine Ma | Helen | Wu Kin's girlfriend Shot and killed in the back by Johnson |