Martin Riggs and Roger Murtaugh pursue a former LAPD officer who uses his knowledge of police procedure and policies to steal and sell confiscated guns and ammunition to local street gangs.

With personal crises and age weighing in on them, LAPD officers Riggs and Murtaugh must contend with deadly Chinese triads that are trying to free their former leaders out of prison and onto American soil.

Riggs and Murtaugh are on the trail of South African diplomats who are using their immunity to engage in criminal activities.

Two newly paired cops who are complete opposites must put aside their differences in order to catch a gang of drug smugglers.

Martin Riggs and Roger Murtaugh pursue a former LAPD officer who uses his knowledge of police procedure and policies to steal and sell confiscated guns and ammunition to local street gangs.

With personal crises and age weighing in on them, LAPD officers Riggs and Murtaugh must contend with deadly Chinese triads that are trying to free their former leaders out of prison and onto American soil.

Riggs and Murtaugh are on the trail of South African diplomats who are using their immunity to engage in criminal activities.

Martin Riggs finally meets his match in the form of Lorna Cole, a beautiful but tough policewoman. Together with Roger Murtaugh, his partner, the three attempt to expose a crooked former policeman and his huge arms racket. The crooked cop (Jack Travis) thwarts them at every turn, mainly by killing anyone who is about to talk, but Murtaugh has personal problems of his own as his family are brought into the equation.

Martin Riggs and Roger Murtaugh, after escaping death from the previous movies are put on a hit list by The Triads. When blood thirsty mercenaries are on their tail they team up again with Leo Getz and Lorna Cole, a newcomer (Chris Rock) to finally put an end to the Triads for good.

Riggs and Murtaugh are trying to take down some drug dealers but the they turn out to be not run of the mill drug dealers; they have automatic weapons and helicopters. Eventually they grab one of their vehicles and find a million dollars worth of gold coins or Krugerrands in the trunk. Later Murtaugh is threatened by the men they're pursuing. That's when the Captain reassigns them to protect a man named Leo Getz who is suppose to testify in a big case. When they get to where Leo is, someone tries to kill him and that's when they learn he laundered half a billion dollars worth of drug money. He then takes them to a place he once went to and that's when the people there start shooting at them. Later when they come back with back up they learn that the men work for the South African consulate and have diplomatic immunity. They deduce that they are the ones they were looking for, but because of they have diplomatic immunity they can't do anything.