In the Line of Duty 4 (1989)

In the Line of Duty 4 is the kind of Hong Kong action-crime thriller that earns its thrills the old-fashioned way: with clean, hard-hitting choreography and set pieces that feel engineered by a master craftsman. Directed by Yuen Woo-Ping, it moves with a brisk, street-level urgency even as the case widens into murkier international territory, and the tension comes as much from mistrust and pressure as it does from fists and gunfire. Cynthia Khan brings a steel-spined intensity, Donnie Yen adds crackling physical authority, and the film’s action isn’t just loud—it’s precise, inventive, and satisfyingly “packed” in the way fans of peak late-’80s Hong Kong cinema crave. It’s definitely not for viewers who prefer bloodless, sanitized crime stories, but if you want a tough, propulsive ride where the choreography tells its own story, this one delivers.

In the Line of Duty 4 is clearly trying to fuse gritty Hong Kong cop action with an international conspiracy thriller, and you can feel Yuen Woo-Ping aiming for big-stakes momentum. The problem is the screenplay piles on so many double-crosses and shifting allegiances that the plot starts to feel more exhausting than intriguing, especially if you like your crime stories clean and coherent. If you’re here for Donnie Yen and Cynthia Khan doing what they do best—hard-hitting fights, sharp physicality, and that late-80s action snap—you’ll get your money’s worth, but don’t expect the narrative to hold together elegantly. If convoluted twists and “wait, who’s betraying who now?” moments annoy you, this one may test your patience despite the solid action.