Season 3: Arma letal - Where to watch

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An FBI investigation of Cole makes Murtaugh question his loyalty to his partner. Cole works a case that involves Natalie's fiancé.

Cole goes against Murtaugh's advice and reaches out to Barnes for help with a case that's personal, straining the partners' relationship.

Investigating an illegal immigration case, Cole and Murtaugh uncover a problem with the border patrol. Preparing to run for DA, Trish faces her past.

Cole and Erica's relationship gets complicated. Murtaugh and Cole investigate the death of an underground MMA fighter. Trish mulls a run for office.

Murtaugh is pulled into a case while on a family vacation. Cole investigates a murder by himself but Erica's mother, a senator, stirs up trouble.

On the rebound, Cole pursues a new romance. Murtaugh is concerned about the connection between his murder case and a job opportunity for Trish.

Cole hosts Maya for Christmas and investigates a burglary to which he has a connection. Bailey and her new partner examine the murder of a jogger.

Cole must face having to let Natalie go when her boyfriend proposes. Kicked out of the house for Trish's "girls' night," Murtaugh makes a new friend.

Murtaugh turns to Barnes for assistance in rescuing Cole from a cartel. Murtaugh and Trish finally meet Cole's ex-wife Natalie and daughter Maya.

Cole partners with his former mentor Barnes to find a rogue CIA agent. Murtaugh dislikes Trish's newest client and asks Bailey to investigate her.

The partners investigate a fine art heist and Cole makes a connection with the crime's mastermind. Murtaugh's daughter discovers he's lying to Trish.

The ghosts of the past haunt Cole, who recalls his time with the CIA, and Murtaugh, who wonders if a suspect he put away years ago was innocent.

The detectives look into a lotto scam while Cole mistakenly brings his daughter to work and Murtaugh endures a visit from his father-in-law.

Murtaugh and Cole are assigned to investigate the murder of a financial executive. Cole discovers that his wife is dating an anesthesiologist.

A veteran of Afghanistan with traumatic memories, Wesley Cole takes a job with the LAPD and ends up partnered with a still-grieving Murtaugh.