Detective Ambrose investigates a tragic yet suspicious car accident on the outskirts of Dorchester.

Ambrose looks into Jamie and Nick's relationship before the crash. Jamie begins to unravel.

Ambrose investigates Jamie's past. Leela gives birth as Jamie's anxiety reaches a breaking point.

Ambrose pursues Jamie through New York City and tries to prevent another homicide.

Jamie pays Sonya a surprise visit. Ambrose goes to extreme lengths to get a confession.

After a major turn in the case, Ambrose's tactics are scrutinized.

Jamie seeks vengeance, putting him on a collision course with Ambrose.