Murtaugh follows Riggs down to Mexico, where he plans to avenge his wife's death and finish off Tito Flores once and for all. Once back in the States, they have a few people to answer to during the ongoing investigation around Flores, including Murtaugh's family. Meanwhile, Avery is questioned by Internal Affairs about the integrity of his department. Written by Fox

Riggs and Murtaugh respond to the death of a plastic surgeon, drawing them into a case involving an illegal drug ring run out of a wellness clinic. Things heat up when Palmer from the DEA and Riggs compete to solve the case first. Meanwhile, Trish and Murtaugh face the emotional challenges of sending their first son, RJ, off to college. Written by Fox

Riggs and Murtaugh investigate the death of a famous singer's bodyguard.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

TV show based on the popular 'Lethal Weapon' films in which a slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

After the city's gun buy-back program is robbed, the team is on a hunt for those responsible. Meanwhile, Murtaugh walks on thin ice with Trish, Riggs finds an unlikely friend in Ruthie, and Captain Avery is reunited with a college frenemy who has key information about the case. Written by Fox

After the fatal end to an argument on a construction site, the squad works to untangle facts about the incident. Meanwhile, Riggs struggles to rekindle his relationship with Molly, Trish's job is on the line as she tries to close a big deal at work, and Murtaugh gets one last chance to make it right at home. Written by Fox

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

A slightly unhinged cop is partnered with a veteran detective trying to maintain a low stress level in his life.

On Murtaugh's first day on the job as interim captain, the wife of a popular businessman is abducted and the squad finds a connection in the case to Riggs' father (guest star Rex Linn). Meanwhile, Riggs is left to grapple with his family and work.

The squad is on high alert after an apparent threat is made on Riggs' life. With Murtaugh taking on more responsibility at work, he and Riggs have to deal with their changing relationship. Meanwhile, Trish gets caught up in some trouble and Molly asks Riggs to make a big decision about their future.