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.
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.
Julie and Billy book a gig at The Cutting Room but Billy’s new found obligation to family threatens to compromise their big break.
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.
Mayor Buddy Gray asks Tommy to personally oversee the investigation when a Hollywood producer is attacked during a party at his home by a woman who claims he tried to sexually assault her first. Also, Tommy prepares for the LAPD recertification process to demonstrate her fitness for her position.
