Kristine Johnson

Holmes moves in on Moriarty as Sebastian Moran returns to warn Sherlock about his enemy's latest antics.

Sherlock takes a case from a man that claims he is Moriarty, in the hope that it will bring him closer to finding his nemesis. Meanwhile, Gregson suggests to Joan to give up the line of work she has chosen and go back to being a sober companion.

Donald Hauser, a wealthy manager in the midst of a financial scandal, is found dead in his flat. Sherlock quickly suspects Chloe Butler, a friend of Watson's who prepared the victim's meals.

Holmes and Watson work with the NYPD to investigate the murder of a police officer, while Sherlock also has a personal mystery to solve.

Finch, Reese, Fusco and Shaw attempt a final mission to keep Samaritan from destroying The Machine and establishing its hold over mankind.

The team needs to unravel a conspiracy when the President of the United States becomes the latest POI; Finch considers drastic action to combat Samaritan.