After a brutal loss, Billy decides to formally take on Julio Suarez's defense but, before he can go back to court, he must get his team back together.

When Billy learns the name of the real shooter, he has to turn to the FBI to help him bring his elusive suspect in for questioning.

Billy tries a risky strategy to suppress the prosecution's two key pieces of evidence, hoping he can clear Julio's name before trial even begins.

Billy finally gets a witness who can exonerate Julio, but he won't talk unless Billy can convince the prosecutor to give him a deal.

Believing his client will soon be a free man, Billy joins Marisol for a romantic weekend in Mexico, only for his case to fall apart at home.

Held hostage by strangers and with no memory of how he got there, Billy has to make a harrowing escape from Mexico.

On the night of the mayoral election, Billy and his team race to take down the people responsible before they become an unstoppable Goliath.

The unexpected death of an old friend takes Billy McBride to California’s Central Valley, where a record drought has made water more valuable than human life.

Billy’s investigation into the Central Valley’s water problem threatens the launch of Diana Blackwood’s almond-based lifestyle brand.

As Billy and Patty begin a class action lawsuit against the corporate farmers, the Blackwoods start dealing with everyone who gets in their way, including Billy.

Flashing back to before the events of the season, Billy has a drunken weekend at the Rising Sun Hotel and Casino, crossing paths with the Blackwoods and their scheme to steal water.

As Billy and Patty make their first appearance in court, their class action is threatened when they walk into traps set for them by the Blackwoods.

Billy and Patty grill the Blackwoods in their depositions, shining a light on their complicated relationship and how they obtained ownership of the county’s water supply.

Billy puts Wade Blackwood on the stand and under oath, forcing him to admit every detail of his scheme to steal the state’s water.

As Billy and Patty close in on the Blackwoods, Wade tries to cover up their crimes while Diana makes one final, desperate play, regardless who gets in her way.

Billy returns to his Big Law roots after Patty takes a job at a prestigious white-shoe law firm in San Francisco. Together, they try to take down one of America’s most insidious Goliaths: the opioid industry.

Patty finds herself on the hook for Billy’s behavior as he digs deeper into the case.

As Billy and Sam grow closer, he discovers that the opioid industry is keeping bigger secrets than he ever imagined.

Billy goes to extremes to keep the case alive, and Sam questions whether bringing him on board was a good idea after all.

As Billy faces repercussions from his conduct, he is forced into a truce with an old adversary.

Billy and Patty take measures to protect a witness, while the partners at Margolis & True scramble to strengthen their case.

When Patty calls a surprise witness to the stand, the defense does everything they can to undermine the witness’s credibility.

In a final showdown with George Zax, Billy and Patty seek justice for the victims of the opioid epidemic, no holds barred.