Grace Travis is a loving wife and mother and one of the bay area's best undercover detectives. After her son, Sam, is killed in an apparent drive-by, Grace's life is shattered.

Rogue

The Aquarium

Jimmy Laszlo has discovered Grace's true identity. While pleading for her life, Grace convinces Jimmy that there’s a traitor in his own organization, and it’s tied to her son's death.

Fireball

The Laszlos feel the fallout from Alec's retaliation against Clay Street. The Chinese want blood or money, and the police want justice. Grace convinces Jimmy to take pre-emptive action by walking into the police station on his own.

Cathy's Song

Jimmy reprimands Alec for killing the two crew members. If he ever wants JImmy's seat, he's going to have think through his actions more carefully. Grace questions Jimmy about the killing, he admits Alec was behind it.

Sweet And Sour

Jimmy and Grace go through Charlie's papers searching for a lead. Grace asks Mitch to run the serial numbers on money they find in Charlie’s home. He discovers a link to a treasure agent, Michael Chen, who committed suicide five months earlier.

Hawala

Grace tells Tom he and Evie need to stay someplace else for a couple days.  Although Grace won't tell him why, Tom suspects something is wrong.  Tom decides to take Evie to stay at Shelley's place.

The Second Amendment

Grace manges to escape from Max who knows her real identity. Grace informs Mitch she needs to tell Jimmy that Max is the one moving against him. Mitch warns that could backfire.

Rumpus

Back at her apartment, while cleaning up from the fight with Max, Jimmy surprises Grace – he’s drunk and depressed –  he’s ruined everything.

A House Is Not a Home

Grace is processed and interrogated for the murder of Max Laszlo.

Chasing the Dragon

The truth behind Sam's death is revealed. Grace escapes from the hospital and, unable to get hold of Mitch, Grace turns to Wilson for help. Wilson explains that Max’s arrest was staged and that Max grew up with another detective in OPD.

Killing Grace

Pluto

Mia is on the hunt for Ethan, having escaped from federal custody, without realising that Patrick is in turn on her trail. Ethan must contend with a corrupt cop. Clea investigates Maria's murder.

How the Light Gets In

Ethan returns to San Francisco hoping for a fresh start. But when Ray's brother asks for help, Ethan gets involved. Mia needs Marty's help to get her off a murder charge. Clea catches a businessman's murder that takes her down a rabbit hole.

Maria, Full of Grace

Ethan tracks down Clea while getting dragged deeper into the world of Casey Oaks. Clea investigates Oaks' possible involvement in Maria's murder. Mia reconnects with an old accomplice. Patrick struggles to come to terms with Harper's death.

Lost Hope

Ethan scrambles to raise money to pay off Mia. Mia targets Ray's kids and convinces Sadie to help. Clea searches for the trafficked girls, while Patrick surveils Ethan in the hopes of catching Mia.

The Determined and the Desperate

Ethan robs Oaks and faces the consequences. Mia and Sadie fight over how far they'll go for money. Clea tries to protect one of the young trafficked girls and Patrick finally catches up with Ethan.

Pool Boy

Ethan turns on Clea and Regan. Devastated by Phan's disappearance, Clea searches for clues. Patrick and Ethan investigate the hit-and-run in search for Mia's accomplices. Mia and Sadie are forced on the run.

After helping Clea with her case, Ethan ultimately betrays her; Patrick catches up with Sadie; An emotionally conflicted Grace is tormented with the possibility that her own actions,may have lead to her son's baffling death.

Bifocals

Ethan and Clea team up to investigate the person behind the conspiracy. As they delve deeper into the investigation, Clea follows a seemingly innocent bookseller and Ethan forces Theresa to reveal her hand.

Sunny Side Down

Ethan goes into hiding after the bombing of the Federal building. The bookseller holds Clea captive. Theresa scrambles to tie up loose ends in her hunt for Ethan. Regan agrees to assist Ethan and Clea, but it's a step too far.

The Third Man

Clea and Ethan discover the reasoning behind Regan's murder and rush to find the accountant before he's killed too. While authorities close in on Ethan, he and Clea must work together to uncover an even greater conspiracy.

A Good Leaving Alone

Undercover detective Grace Travis crossed the line between right and wrong and her involvement with the city’s most powerful and dangerous crime family caused her to pay the ultimate price – the loss of her son.

How the Light Gets In

Full Episodes

Season 4, 10 episodes