Joe breaks FBI protocol while working on a joint task force, injuring a drug suspect, over-eagerly failing to prevent the evidence being flushed; Frank temporarily transfers him to a desk job, and that combined with lingering grief over never getting to know his father weighs heavily on Joe's mind. Danny and Baez race against the clock to catch a ritualistic serial killer targeting well-groomed young women across the city, whom he stages with a standard rosary and leaves Biblical notes. Phychiatrist Dr. Walker, who helps them as profiler, proves deeply involved with manic episodes. In psych observation ward, he admits to two murders and hints that more bodies will drop. Badillo and Eddie respond to a stabbing death where a young female office employee admits to killing her boss, reputed a sexual predator, but pleads self-defense. Eddie suggests Erin's ex-husband Jack to represent the woman, leading to tension with Erin, who looses the case. Joe and Frank make up later watching old family movies of the elder Joe.
—KGF Vissers