Alexander Sokovikov

Philip and Elizabeth struggle to contain the risks from Paige's growing relationship with Matthew Beeman, and the Centre sends Philip and Elizabeth on an operation that strains their family and marriage to the limits.

Philip and Elizabeth are racing against the clock as a life hangs in the balance, and they hope they will be able to act in time. Meanwhile, Stan faces an uncertain future ahead of him.

Stan and Oleg wrestle with the harsh consequences of their complicated history, and Philip and Elizabeth face a new mission with devastating implications for their country.

A secret brings Elizabeth and Paige together. In Moscow, Oleg's secrets put him under KGB suspicion, and a new twist in the Morozov operation creates an opportunity that changes everything.

Paige's snooping leads Philip and Elizabeth to make a big choice that could shift the balance of their lives forever. Stan and Aderholt's recruitment of Sofia suddenly bears fruit.

Philip and Elizabeth tell Paige more about the family business, but pressing new questions arise when an operation takes a ghastly and unexpected turn, and a sensitive package jeopardises Oleg's life back home.