# Detective Investigation Files (1995–1999) — Celluloid TV fact sheet

Source: https://celluloidscore.com/shows/detective-investigation-files/
Last reviewed: 2026-07-25

| Field | Value |
|-------|-------|
| Celluloid Score | 83% |
| Critic Score | 83% |
| Audience Score | 87% |
| Metascore | 73/100 |
| IMDb | 8.1/10 |
| Fan Score | 89% |
| Creator | Unknown |
| Platform | iQIYI |
| Genres | Mystery, Crime, Drama |
| Seasons | 4 (150 episodes) |
| Language | Mandarin |
| Country | Hong Kong |

## Quick answer

Detective Investigation Files (1995–1999) is a Mystery, Crime, Drama series created by Unknown, streaming on iQIYI. It holds a 83% Celluloid Score — Recommended — averaged from critic reviews (83%), audience ratings (87%), Metascore (73/100), IMDb (8.1/10), and fan ratings (89%) across 4 seasons.

## Critics consensus

Detective Investigation Files — a major Ken Lok television credit for Celluloid Stars filmography.

## Synopsis

"Detective Investigation Files" revolves around the professional and meticulous investigations carried out by a group of dedicated police officers. As they delve into mysterious deaths with unclear causes, they tirelessly work towards maintaining peace and security for the people. However, their demanding job often comes at the expense of personal happiness.

Cheung Dai Yong, a brilliant and astute police officer, has a track record of solving crucial cases. His trusted colleague, Lee Chung Yee, stands by his side, and together they tackle challenging and complex cases. Amidst their work, Dai Yong encounters Ko Jit, a tenacious journalist. Despite their initial conflicts, a deepening connection blossoms between them. However, Ko Jit already has a romantic partner.

## Cast

Ken Lok, Louis Koo, Jessica Hsuan Huen, Sunny Chan Kam-Hung, Charmaine Sheh Sze-Man, Lee San-San, Maggie Shiu Mei-Kei, Andy Tai Chi-Wai, Samuel Kwok Fung, Edmond So Chi-Wai

## Most searched questions

**Is Detective Investigation Files worth watching?**
Yes — Detective Investigation Files earns a 83% Celluloid Score (Recommended), averaged from critic 83%, audience 87%, Metascore 73/100, IMDb 8.1/10, and fan 89%. Detective Investigation Files — a major Ken Lok television credit for Celluloid Stars filmography.

**Why is Detective Investigation Files so highly rated?**
Detective Investigation Files scores 83% because all five independent sources agree: critics 83%, audiences 87%, Metacritic 73/100, IMDb 8.1/10 and fan ratings 89%. Detective Investigation Files — a major Ken Lok television credit for Celluloid Stars filmography. See the full breakdown on the Detective Investigation Files series page.

**Is Detective Investigation Files on Netflix?**
No — Detective Investigation Files is not on Netflix. It streams on iQIYI, and on Celluloid it is catalogued under iQIYI. Streaming rights rotate by country, so confirm in your region before subscribing.

**What year did Detective Investigation Files come out?**
Detective Investigation Files first aired in 1995 and ran through 1999 (1995–1999). Created by Unknown; it streams on iQIYI today.

**How many seasons of Detective Investigation Files are there?**
Detective Investigation Files has 4 seasons across 150 episodes (1995–1999). Status: ended / complete.

**How long does it take to watch Detective Investigation Files?**
At roughly 40–50 minutes per episode, Detective Investigation Files’s 150 episodes take roughly 113 hours of runtime (plus credits). Binge pace depends on season breaks.

**Where can I watch Detective Investigation Files?**
Detective Investigation Files streams on iQIYI in supported regions. On Celluloid it is catalogued under iQIYI. Rights rotate — confirm in your country on the platform app.

**Who is in the cast of Detective Investigation Files?**
Detective Investigation Files stars Ken Lok, Louis Koo, Jessica Hsuan Huen, Sunny Chan Kam-Hung, Charmaine Sheh Sze-Man, and others. Created by Unknown.

**How many episodes are in Detective Investigation Files?**
Detective Investigation Files has 150 episodes across 4 seasons (1995–1999).

**What is Detective Investigation Files about?**
"Detective Investigation Files" revolves around the professional and meticulous investigations carried out by a group of dedicated police officers. As they delve into mysterious deaths with unclear causes, they tirelessly work towards maintaining peace and security for the people. However, their demanding job often comes at the expense of personal happiness. Cheung Dai Yong, a brilliant and astut…

**Who created Detective Investigation Files?**
Detective Investigation Files was created by Unknown. It is a mystery, crime, drama series from Hong Kong, primarily in Mandarin.

**What should I watch after Detective Investigation Files?**
Browse more mystery series on Celluloid’s iQIYI hub, or open More Like This.

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Reviewed and scored by Celluloid · Editor: Kaiser Khan (https://celluloidscore.com/author/kaiser-khan/)

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