Forgive, But Don't Forget

Mike Jr. is upset when he sees a copy of his parents' divorce decree and gets into the sacramental wine at St. Vincent's, leading Mike to realize the importance of spending more time with his son; Grizz's high school sweetheart comes back into his life when she divorces her husband and comes to work at the parish; the cop who arrested Mike is mounting a case against Marcellus and asks Mike to flip on his former partner; when the cop's son is murdered during a robbery, Marcellus is assigned the case, which goes cold when the only witness is murdered; Mike and Marcellus join forces to find the cop before he administers some street justice to his son's killer; Marcellus offers to help his nemesis cover up his execution of the killer, but the cop declines and turns himself in, giving Marcellus a chance to get out from under his corrupt behavior.