This shocker from Hong Kong is a suitably grim affair but doesn't have the power its cult reputation suggests. The first problem is the script, which presents the psychology of its killer in an amateurish, unconvincing style and also inserts a distracting amount of bawdy, often slapstick humor into a story where it doesn't belong. Another problem is the odd, often silly way in which the story is enacted: Simon Yam is a talented actor but his wild histrionics here, particularly during the scenes where his character becomes unglued, are so overdone that they descend into self parody. Actor/director Danny Lee fares better as the main cop on the case but he has little to do other than to react to Yam's antics. As a director, Lee displays an effective, often alluring visual style. Unfortunately, this style often works against the material, giving it a surreal look that distances the viewer from the ugly events going on and lessens their impact. In short, Dr. Lamb has the shocks one might expect from a film with this sort of premise but its odd storytelling choices undermine its overall power.