Alexander Sokovikov

Holmes and Watson pursue a computer hacker responsible for three murders, including the murder of a visiting Russian billionaire.

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.

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 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.

Philip and Elizabeth have qualms about a new assignment, a spectre from Philip's past creates unforeseen dangers, and at the FBI, Stan makes a shocking play that could throw his career into turmoil.

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.