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.
Finch goes undercover in an emergency call center to protect a 911 operator in a state of emergency, but it soon becomes clear that the threat reaches further than the team could have anticipated.
San Bernardino, CA, 1964: When Lucille and Cork Miller's car crashes, Cork burns to death inside. Half the evidence suggests it was an accident, but could Lucille have wanted her husband out of the picture?
