Former Marine Frank Castle takes the law into his own hands while struggling to come to terms with his traumatic past.

A mysterious phone call forces Frank's hand. Meanwhile, Madani goes digging for suspects and Curtis delivers a message.

Frank skips the subtlety while interrogating Micro. Brutal memories of top-secret missions shed light on Frank's past.

Madani and Sam plan a delicate operation, Curtis tries to connect with Lewis, and Frank encourages Micro to get his hands dirty.

Frank and Micro go looking for answers from a reluctant witness. Madani and Sam learn of a looming investigation. Rawlins sees a ghost.

With Frank in bad shape, Micro calls on Curtis for help. Madani and Russo continue to mix business with pleasure. Lewis stands up for his rights.

Lewis struggles with the ramifications of his actions. Frank and Micro pursue another face from the past. Madani and Sam go bug hunting.

Russo reveals details of his past to Madani, and Sarah discusses her worries about her son with Frank. Micro runs the imagery from Frank's scope and an unexpected turn occurs during a decoy operation.

Karen enters a bomber's crosshairs after a deadly explosion, which makes Frank upset. Curtis comes across a grisly discovery. Madani recuperates with some help from her mother.

People bring different perspectives as they examine an attack on a high-profile politician. Madani confronts a difficult truth, and questions are asked about Lewis and Frank.

Russo goes on television to blame Frank and accuse him of losing his way. Frank receives help from an unexpected ally, taking his search for vengeance to another level, while danger nears for Sarah.

Sarah considers what she should believe following a shootout, and Frank delivers a damning confession to Madani, discussing his work with the CIA. Rawlins steps forward to make the kill.

Madani brings Frank to her house so he can receive medical help. Exhausted, but unbroken, Frank commits to ending the war that has taken over his life, just as the authorities close in.