Brian O'Neill

Sherlock and Watson consult on a child abduction case involving a serial killer who is nicknamed "The Balloon Man," because he leaves a signature batch of balloons at each of his crime scenes.

Artie's business is jeopardized by a rival restaurant and staff scandal that leads to a fight with Benny. Told to make peace, Benny winds up giving the volatile Artie a hand with his tomato sauce. Meanwhile, Christopher and Little Carmine take a wild trip to L.A. to pursue Sir Ben Kingsley to star in 'Cleaver,' and enjoy a 'swag grab' at Lauren Bacall's expense.

Karen Smythe (Khandi Alexander) is a police officer who responds to a routine call with her partner, Mitch Murray (Jason Kolotouros), but the two get separated and Karen disappears in a warehouse where she is brutally raped and almost murdered.

When a serial killer commits four brutal murders in 24 hours, Detectives Benson (Mariska Hargitay), Munch (Richard Belzer) and Fin (Ice-T) canvas the streets searching for signs of a madman who exclaims paranoid and twisted religious rhetoric while committing his crimes. Richard Thomas and Karen Allen guest star.

It's decision time for Detective Carter. When Carter finally comes face-to-face with Reese, he urges her to join forces to help with their latest POI, a scrappy young woman from the wrong side of the tracks who turned her life around and became a lawyer.