Looking to feast your eyes on "Detective Investigation Files IV" on your TV or mobile device at home? Discovering a streaming service to buy, rent, download, or stream the mystery TV series via subscription can be a huge pain, so we here at Moviefone want to help you out.
Read on for a listing of streaming and cable services – including rental, purchase, and subscription platforms – along with the availability of "Detective Investigation Files IV" on each platform. Now, before we get into the ways and means of how you can watch "Detective Investigation Files IV" right now, here are some particulars about the show.
Originally premiering September 7th, 2025, "Detective Investigation Files IV" stars Louis Koo, Jessica Hsuan, Sunny Chan Kam-Hung, Charmaine Sheh Sze-Man. The series runs 1 season(s), and has a score of 80 (out of 100) on TMDB, which compiled reviews from 1 experienced people.
Want to know what the show's about? 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."
"Detective Investigation Files IV" is currently available to stream via subscription, rental, or purchase on .
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