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.
The Strategic Response Unit is called in when a man charged with killing his own baby escapes a prison transport and is on the run.
A stifling heat wave has wreaked havoc on the city, multiplied by growing fears of a serial rapist on the loose. Amid the chaos, a sudden blackout forces Andy to take down a vicious predator – alone.
