Synopsis
皇家師姐IV直擊證人
Two detectives who are up to their necks in trouble and in each other's face, as they try to shut down a drug-trafficking scheme that could be connected with international ties to organized crime. But in the midst of their investigation, innocent immigrant dock worker Luk Wan-Ting gets caught up in the mix when he witnesses the murder of an intelligence operative and is framed for the crime.
Other Titles From D & B Films
Adventure + Action in Hong Kong
81 Hong Kong titles in our catalog blend the Adventure and Action genres. Below: the top-rated of them (excluding In the Line of Duty 4 itself).
The 1988–1990 Hong Kong Window
In the Line of Duty 4 holds position #19 of 67 Hong Kong films in the 1988–1990 window, below highlighted by audience rating.
The 1980s Hong Kong Landscape
1989 was the decade’s peak output year for Hong Kong — 20 titles released, including In the Line of Duty 4. Bars below show how the 1980s stacked up year by year (151 total).
Position in Catalog
Released alongside 19 other Hong Kong films in 1989.
The 273rd Hong Kong title from Hong Kong we index (earliest catalogued entry: 1955).
Our Hong Kong catalog contains 836 titles in total (828 films).
Audience Engagement
41 audience reviews — more than 64% of Hong Kong films in our index.
Popularity (81th percentile) outruns review volume (64th) — a trending, discussed title among Hong Kong films.
Reception Benchmarks
Ranked #166 of 836 Hong Kong films indexed here (80th percentile by TMDB audience score).
Rating is +0.6 points above the Hong Kong average of 6.3/10.
Among Hong Kong Adventure productions specifically: #23 of 91 (top 25%).
Production Details
| Primary Country | Hong Kong |
|---|---|
| Original Language | Cantonese |
| Production Companies | D & B Films |
| Runtime | 1h 34m |
| Release Date | July 21, 1989 |
| IMDb | tt0097539 |



















