Stivi Paskoski

Sherlock assists with a double homicide that has the same M.O. as a series of murders that took place 13 years ago. Meanwhile, after being frozen out by Sherlock, Watson visits his old rehab center in order to learn more about the mysterious man in her care. Callie Thorne guest stars.

Sanitation workers find the body of a young woman, which they picked up inadvertently along their route. She's dead of a single gunshot wound to the head, has track marks on her arms, as well as cocaine and heroine in her system and no identification. The M.E.has pulled her breast implants and through a serial number, tracks down the cosmetic surgeon who grudgingly identifies the patient as Patty Voytek. Briscoe (Jerry Orbach) and Green (Jesse L. Martin) go to Patty's billing address, a talent agency, and realize she goes by her pseudonym, Jane Hunt, and she's a professional musician. Jane's a semisuccessful rock guitarist who is actually better known as the girlfriend of Shane Mallory, the lead guitarist of a hugely successful cult-punk band called Krisis. Jane's final hours are traced -- she checked out of a rehab facility to go on a drug binge.

When Detectives Cyrus Lupo (Jeremy Sisto) and Kevin Bernard (Anthony Anderson) arrive on the scene of four fallen police officers, they have to act fast to find the shooter. With a room full of witnesses, they have a description of the culprit but little else. The case becomes even more complex when the detectives discover that the police officers may have known the shooter. The investigation quickly leads them to a circuit of drug dealers, a jealous husband and a remorseful judge who are all pieces of a larger puzzle. Also starring: S. Epatha Merkerson (Lieutenant Anita Van Buren), Sam Waterston (District Attorney Jack McCoy), Alana De La Garza (Connie Rubirosa) and Linus Roache (Michael Cutter).

Mace fights for his life while Coulson and team find themselves in a deadly cat-and-mouse game as they attempt his rescue.

Logan and Wheeler discover evidence of drug abuse when a former child star is found beaten and murdered; evidence leads them to the Albanian mob and a counterfeiting operation.