Creegan and Branca investigate a series of apparent mercy killings at a hospital and find evidence suggesting the killer has had a near-death experience.

A man finds his wife dead in his trunk, and the team learns of similar cases in Port Endicott, Wash.

A series of killings forces Creegan to question whether his friend is capable of murder.

Creegan and the OSC investigate a serial killer in Creegan's hometown, Boston.

Still reeling from the departure of his family into protective custody, Creegan befriends a murder witness who claims her biological son was abducted by a Ukrainian child-smuggling ring.

An investigation of a contract killing leads Creegan and Branca to a murder witness seeking her biological son---and to a Ukrainian child-smuggling ring.

Creegan and Branca hunt an assassin targeting members of a military unit that were veterans of the Iraq War.

Branca reignites a romance with a crime reporter, but the relationship is jeopardized when Creegan learns some damaging information about the journalist.

Creegan suspects the serial killer behind the deaths of three prostitutes is obsessed with a convicted murderess who gives Creegan a hard time when he asks for her help.

Insomnia plagues Creegan as he hunts a murderous arsonist who sets his victims on fire.

In the series opener, FBI agent Dave Creegan recovers from a bullet wound to the head to probe a child abduction case with enhanced deductive skill. His uninhibited personality traits, however, try the patience of his new partner.