Before the onset of production, Keanu Reeves and various other members of the cast were put through extensive training on all the facets of law enforcement.

• 真相越是清晰，阿汤越见矛盾；敌人强势逼近，阿汤变得更为勇猛，好拍挡迪更斯（基斯伊云斯饰）曾为此屡度擦身死亡边缘。