Cookie the police dog sniffs out a stash of heroin in a little girl's backpack, leading Russ and Milt to search for evidence to back their competing theories as to where the drugs came from and why she had them. Elsewhere, Jacocks does some digging into the reason Milt has been sent to Battle Creek while she's in Detroit for a training seminar.moreless
New York Detective Jack Larson joins the TAU team in Los Angles to help them catch a stalker who burned a young woman alive in her car. Meanwhile, Lieutenant Beth Davis must deal with a young college student who has been stalking his old roommate.moreless
While Reese and his new partner Sam try to find a Number, a naval petty officer in town for Fleet Week, Carter tries to eliminate HR for good after being demoted to patrol officer because of a frame-up. Meanwhile, Root settles in to her new life at the asylum.moreless
One of Libby's moms seeks Hank's medical help. Evan has his proposal accepted but he needs the General's blessing.