In the fourth and reportedly final film of the Lethal Weapon series, director Richard Donner reunites with Mel Gibson and Danny Glover, who reprise their roles as Martin Riggs and Roger Murtaugh for one last hurrah in a film that is decidedly better than the third and first chapters. This time the pair are pitted against Jet Li, who plays the leader of a Chinese organized crime unit. Li, a veteran of hundreds of Hong Kong action films, more than holds his own against the more established team of Gibson, Glover, Renee Russo, and Joe Pesci with his subtle yet strong portrayal of the quietly irrepressible Wah Sing Ku. As always with the Lethal series, the plot is incredibly simple to follow: someone steals something, someone gets killed, and Murtaugh is reluctantly thrown into the mix while Riggs dives into the case with gleeful aplomb. As with the previous movies, we watch for the sheer action and chemistry alone. The action sequences throughout the fourth installment are exquisite, from...