S3, E5: When Mary's new witness, Dominic, a former sociopathic hit man with a love of explosives, falls in love for the first time, Mary hopes he will finally have a shot at normalcy and redemption. Unfortunately, it all goes pear-shaped when Dominic is bullied by a local crooked politician at the same time his girl breaks his heart. Mary races to stop Dominic from taking out his pain in the form of an explosive device meant for his ex-girlfriend. Guest starring Cristian de la Fuente.