Determined to track down Blunt and warn him about Yassen’s return, Alex unknowingly puts himself on a collision course with The Department, who are simultaneously hunting a dangerous cyber-terrorist.

As the Soviets test the H-bomb, both Churchill and Eden have major health crises. Angry about her inadequate education, Elizabeth hires a tutor.

Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him.

Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him.

The president of the USA makes an unexpected stop in London. Tom and his team are forced to work with the CIA. A power struggle between the two secret organizations…