Those Who Kill

A drama about serial killers: the ultimate violent criminals who are surrounded by fear and mystique. When murders are not grounded in traditional motives and patterns of behavior, it takes a very particular kind of person to catch the serial killer; someone who knows and understands the killer's dark side and the fantasies that plague him.

While Catherine waits to be cleared for duty by the D.A.’s office, and Thomas secretly investigates Catherine’s past, a brutal murder and a John Doe suicide are discovered.

As the killer escalates, Catherine uses the investigation of the two victims to push Thomas to research her allegations further.

Catherine is forced go to Ray for more information on the case, while Thomas has a real conversation with John about getting inside the minds of murderers. Using Thomas’ narrowing profile, Catherine closes in on the killer.

Thomas’ decision to stop working on active cases causes Catherine to investigate his past, leading her to an unexpected family history. Catherine takes Thomas to the scene of her childhood trauma where she finally reveals all the details that still haunt her.

Reeling from Thomas’ revelation about Marie, Catherine throws herself into investigating a family annihilator. Meanwhile, Thomas struggles with his past demons resurfacing.