Mel Gibson set aside his art-house credentials to star as a crazy cop paired with a stable one (Danny Glover) in this full-blown 1987 Richard Donner action picture. The most violent film in the series (which includes three sequels), Lethal Weapon is also the edgiest and most interesting. After Gibson's character jumps off a building handcuffed to a man, and Gary Busey (as a cold, efficient enforcer) lets his hand get burned without flinching, there is a sense that anything can happen, and it usually does. Donner's strangely messy visual and audio style doesn't make a lot of aesthetic sense, but it stuck with all four movies. --Tom Keogh

The series formula started to kick in with this immediate sequel to Lethal Weapon, but that doesn't necessarily make it a weak movie. Joe Pesci joins the fold, Richard Donner directs again, and Mel Gibson and Danny Glover return as LAPD partners, their relationship smoother now that Gibson's character has recovered from his maddening grief over his wife's death. But the reckless Mel and cautious Danny equation, good for a million laughs, settles into place in this story involving a South African smuggler and a new girlfriend (Patsy Kensit) for Gibson. The movie is hardly comfy, though. The last act gets nasty, and a climactic fight between Gibson (who gets the worst of it) and some high-kicking villain is ugly. --Tom Keogh

The lightest of the first three films, Lethal Weapon 3 finds everyone occupying comfortable positions like students who always choose to sit in the same classroom seats. Mel Gibson and Danny Glover return as LAPD partners whose working method consists of the former diving into danger and the latter holding back. (The sequence set in the parking garage of a building, in which Gibson inadvertently trips a switch that makes a timed explosive device speed up, is priceless.) Joe Pesci once again plays a motor-mouth pest, and while the story is pretty much forgettable, it does introduce the best new dynamic in the series, a romance between Gibson and Rene Russo's equally tough but attractive cop. --Tom Keogh