Lethal Weapon (1987) http://www.imdb.com/title/tt0093409/
A veteran cop, Murtaugh, is partnered with a young suicidal cop, Riggs. Both having one thing in common; hating working in pairs. Now they must learn to work with one another to stop a gang of drug smugglers.
Lethal Weapon 2 (1989) http://www.imdb.com/title/tt0097733/
Riggs and Murtaugh are on the trail of South African diplomats who are using their immunity to engage in criminal activities.
Lethal Weapon 4 (1998) http://www.imdb.com/title/tt0122151/
With personal crises and age weighing in on them, LAPD officers Riggs and Murtaugh
must contend with a deadly Chinese crimelord trying to get his brother out of prison.