Lucca defends a TV writer-producer in a copyright infringement case with ties to the President of the United States. Mike Kresteva takes aim at Reddick, Boseman & Kolstad. Carrie Preston, Matthew Perry and John Benjamin Hickey guest star.
Sherlock resumes his hunt for Moriarty when Sebastian Moran reveals that a man who was thought to be dead from a heart attack was actually on the list of intended victims from Moriarty. Vinnie Jones returns as the sinister "M." F. Murray Abraham guest stars as "The Actuary," a devious hitman.
Julie and Billy book a gig at The Cutting Room but Billy’s new found obligation to family threatens to compromise their big break.
The death of a show horse seems a more likely case for the ASPCA then Briscoe and Curtis, until a shady horse dealer is accused of selling sick horses to unsuspecting, older investors. Later, Kincaid and McCoy push for a conviction when the horse's owner disappears and is presumed dead.
King Silas' (Ian McShane) birthday celebration is interrupted by a citywide blackout that puts the royal family in danger. The blackout gives Michelle (Allison Miller) and David (Christopher Egan) a chance to be alone, and provides Jack (Sebastian Stan) with an opportunity to engage in his secret double life without being noticed. Meanwhile, a decision from Silas' past catches up with him and threatens his future. Also stars Susanna Thompson, Wes Studi and Dylan Baker.
