Grace investigates a prostitution ring; Grace's estranged mother returns; Tom prepares to make a confession to Grace; the first contract for Ethan and his team.

Grace accosts Elliot and Leni over the search for Sarah; new evidence surfaces; Detective Lee serves as intermediary; Elliot reveals information about the investigation to Leni; Ray and Spud enter the fray after learning about Cheat.

Grace exposes Ethan's lies about the night of Cheat's death; Leni learns how Ethan and his team met; Detective Lee follows Ethan; Ethan and the team sense trouble; Billy and Evie bond.

Grace contemplates Elliot's proposal that she go undercover. Elliot confronts Leni about speaking to her Pentagon contact. Billy gets into a fight. Spud and Ray find a potential asset who can help them. Ethan meets with a contact to ask about Nina. (C) DirecTV

A figure from Grace's past returns without warning, complicating her relationship with Ethan; Leni gets an crucial update from her Pentagon contact; Grace learns of Billy's fight; the task force listen in on Ethan and his team.

A panicked Spud seeks help from Ethan and Ray, and hatches a plan for skipping town; Grace shares her findings about Ethan with Leni and Elliot; Alec attempts to alter his deal with Campbell; Elliot makes an arrest that poses big problems.

Ethan tells Grace they borrowed money from the wrong men just as Ray realizes there's something wrong.

Ethan and Ray try to come to a conclusion about Spud; Leni and Grace speculate about Ethan; Billy tries to win back Evie; Grace finds a clue in the search for Sarah.

Leni and Grace experience a revelation in Vancouver; Cheat's cause of death is revealed; Ethan and Ray venture to Vancouver; Evie stays with Tom; Ethan and Ray clash over how to handle the cash.

Ethan clashes with Ray; Grace makes amends with Evie; Ethan's cash source is revealed; Sarah and Grace follow Ethan and Ray; Grace's report raises some red flags; an important official questions Ethan.