Internal Affairs knows Robert Patrone is one of the dirty cops on the Chicago force who isn't above planting evidence to make a case. But instead of taking him down, the FBI offers him a deal in exchange for ratting out his fellow cops on the down-low. Patrone takes the deal-if he didn't somebody else would. Besides, he doesn't want to go to jail. When his partner Garrity finds out, he comes after Patrone but in the confrontation, it's Garrity who ends up going down.
After testifying, the grand jury hands down nineteen indictments in the case, which makes him a local hero with the citizens but an enemy of the force. Staying on the police force obviously isn't an option so Patrone has no choice but to go into Witness Protection.
When Mary and Patrone, now known as Eps, meet there are immediate sparks. Even though she knows it's against the rules and an all-around terrible idea, she gives into temptation and sleeps with him-just once. Afterwards, they part ways and have minimal contact over the next year. Things might have continued like that, but when an Albuquerque cop with ties to the force in Chicago is murdered, Eps becomes the prime suspect. Mary has to both prove his innocence and keep their past from damaging her career as she goes head-to-head with Bobby D. and the slain cop's enraged partner, Roxanne, who is one tough cookie herself.
Mary tells Brandi that she doesn't want her and Raphael to stop being friends. But when Brandi goes over to his house make nice and Raphael admits to having had a brief dalliance with his physical therapist when he and Mary were semi-broken up, Brandi slaps Raphael and storms out. Brandi doesn't know what makes her angrier: the fact that Raphael kind of cheated on Mary or that he cheated on Mary with someone else other than her.