Elizabeth's staff fails to find existing corruption in her microloan program, leaving her humiliated at a public budget hearing; an investigation into Marsh's death progresses.

Sherlock reels when his former lover, Irene Adler, reappears.

While Elizabeth deals with a crisis in Yemen, her eldest daughter makes headlines for protesting a new university policy.

Philip and Elizabeth are finally assigned a new handler as Philip works to clean up the mess of the last operation and Elizabeth, in disguise as Clark's sister Jennifer, does her best to smooth things over with Martha. As Stan searches for a missing scientist, Oleg and Arkady continue to argue over how best to handle the situation on their side, leaving Nina once again caught between the FBI and KGB.

Alicia searches for answers as she tries to make sense of Will's death in the aftermath of the courthouse shooting. Meanwhile, Diane delivers the somber news to the partners at Lockhart/Gardner who must decide how to move forward. Matthew Goode guest stars.