Ethan and Clea discover what happened to Regan. They race to find the accountant before he's taken out. As authorities close in on Ethan, he and Clea work to uncover a greater conspiracy.

Ethan deals with an unexpected gunman and questions whether Mia can be trusted. In other events, Marty tries to contain the damage after the audio of Talia's death is leaked.

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.

Harper contains Patrick; Marlon is arrested for Talia's murder; Ethan makes a new deal with Marty, who learns that Marlon betrayed him; and Harper breaks the Hutchings' murder case wide open.

Ethan and Clea work together to discover who's behind the conspiracy. Ethan forces Theresa to reveal her hand. Clea follows a seemingly innocent bookseller. Ethan does Theresa's bidding to unexpected ends.

Marty refuses to help Marlon, whose business is in jeopardy; Harper questions Patrick; Ethan decides what's next now that he's free; and Talia sets up Marlon.

Ethan discovers that the Russian mob was hired to kill Mia; Patrick agrees to help Harper investigate Greg Barrett's murder; and Marlon tries to get his assets back.

Grace is jailed after being arrested for murder; Mitch and Wilson discover they share common interests; Tom is among the witnesses questioned by Hernandez and Campbell; Alec meets with Jimmy's crew.

Ethan helps Clea with her case before double-crossing her. Patrick catches up with Sadie. Clea figures out the identity of the mystery man killed at the warehouse. Ethan, Mia and Marty join forces for one final deal.

Ethan searches for Mia; Harper contemplates going rogue; Marty tries to have the warrant for his DNA tossed; and Marlon seeks revenge against Marty.

Harper finds out Mia's true identity and tries to leverage this to make her turn on Marty. Ethan must decide if he trusts Mia or Marty while the three pull a heist together. Marlon turns back to his old gang lifestyle.

The truth behind Sam's death is revealed. Jimmy meets with the Chinese. Grace confronts Sam's killer. Campbell and Jimmy come to an agreement.

A surprise discovery is made by Leni and Grace in Vancouver. The truth about Cheat's death is also revealed.

Harper is hit hard by Lobo's death; Ethan tells Marty the real reason he's in Chicago; Talia causes problems for Marlon; Grace and Ethan spy on Marty and the General; and Grace follows a dangerous lead.

Tragedy strikes the Travis family. Tom tries keeping the family together. Grace convinces Jimmy he has a traitor in his organization. Mitch hesitates to help Grace. Jimmy discovers his money is missing. Max returns home. Jimmy and Grace make a deal.

Jimmy Laszlo learns Grace's true identity. Alec takes revenge against a rival gang. Jimmy strikes a deal with Grace to find the traitor in his organization.

Grace is on a special FBI taskforce investigating a prostitution ring. Her home life is complicated by her mother, Vivian, who shows up after a prolonged absence. Tom has something to tell Grace. Ethan and team negotiate their first contract.

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.

A firebombing drops the Laszlos between a vengeful Chinese gang and justice-seeking police. Grace finds a link between Jimmy's organization and the shooting outside Sam's school.

Grace discovers Ethan hasn't been truthful about the night Cheat died. Leni reaches out to a Pentagon contact and discovers how Ethan and his team met. Detective Lee tails Ethan. Ethan and the team feel they're in danger. Billy and Evie grow closer.

Grace confronts Elliot and Leni about her concerns for finding Sarah. Evidence is uncovered. Detective Lee becomes a liason. Elliot reveals to Leni the true nature of their investigation. Ethan, Ray and Spud find out about Cheat and take action.

Grace has a police insider trace the money found in Charlie's safe; Alec learns that Max will be taking over Charlie's business; Tom seeks comfort with Shelley; a masked gunman ambushes Grace.

Ethan and Ray are forced to figure out what to do about Spud. Leni and Grace speculate about the money Ethan has given away. Ethan tracks Grace. Billy tries to win Evie back. Evie confronts Grace. Grace finds a new clue in the search for Sarah.

Sam's death is linked to Jimmy's crew; Jimmy delivers a scolding to Alec; Capt. Campbell seeks dirt on Jimmy; Max receives word of the missing money.

Grace learns about the missing money from Jimmy before investigating the abandoned shooting range; Grace sends Tom and Evie packing; Grace gets into Santa Rita with Mitch's help.

Grace is still missing. Ethan heads to Chicago to investigate notorious attorney Marty Stein. DEA Agent Harper Deakins' investigation into one of Chicago's deadliest gangs takes a turn when a routine stakeout goes wrong

Grace works to escape. Ethan reconnects with his father. Escalating gang warfare spills into the suburbs. Ethan investigates Marty's leak at a party, where he meets Marlon Dinard, who is not what he seems.

Grace thinks about going undercover whilst Elliot tells Leni aoff about her contact in the Pentagon. Spud and Ray find an unlikely new ally.