In the mood to watch Detective Investigation Files IV from the comfort of your couch? Detective Investigation Files IV is currently available to stream via subscription, rental, or purchase on in the US.
Here are a few key details about the series. Originally premiering March 14th, 2026, "Detective Investigation Files IV" stars Louis Koo, Jessica Hsuan, Sunny Chan Kam-Hung, Charmaine Sheh Sze-Man. The show spans 1 season(s) and currently holds a 80/100 rating on TMDb, which comes from reviews from 1 engaged users.
Looking for a quick plot summary? Here’s the plot: "Detective Investigation Files IV (Chinese: 刑事偵緝檔案IV) is the 4th and final installment of the Detective Investigation Files TV franchised by TVB in Hong Kong. It is a complete reboot of the series, with new cast. The series focuses on the lives of two detectives, Tsui Fei (Louis Koo) and Kong Chi Shan (Sunny Chan), and the murder cases they deal with."
