Rachel Pickup

Holmes and Watson come face to face with Moriarty when their one-time adversary is brought in as a consultant on a kidnapping case. Meanwhile, Detective Bell continues his struggle on the road to recovery. Natalie Dormer Returns as Moriarty.

As Elizabeth prepares to leave the state department and announce her run for president, anti-globalist terrorists attack the United Nations delegation in Geneva who are there to sign the climate migration treaty.

Nigel's older, more successful brother Preston, a curator at the British Museum, uncovers a riddle written by Henry VIII that may lead to the fabled wedding ring of Anne Boleyn.

As the 20th anniversary of the American embassy bombing in Mali approaches, emotions run high among the State Department staff, who had personal connections to lives lost that day, including Elizabeth, who must decide if the U.S. should lift sanctions against the country deemed responsible. Also, Henry tries to help Jason break up with Piper.