Nambi E. Kelley

Business becomes personal for Sherlock when he is forced to partner with his estranged brother, Mycroft, to solve a case with life-or-death consequences. Lucy Liu makes her directorial debut for television. Rhys Ifans guest stars as Mycroft Holmes.

Flashbacks to Finch’s adolescence provide insight into his creation of The Machine. Also, the team receives the number of an already dying man, and Reese leaves the POI team behind in the aftermath of the war with the crime organization, HR. Camryn Manheim and Saul Rubinek guest star.

Elizabeth secretly travels to Iran in an attempt to prevent a coup that could impact President Dalton's administration. Also, she brings her staff up to speed on the investigation into Marsh's death. Anna Deveare Smith guest stars.