The Jennings struggling to contain the risks from Paige's growing relationship with Matthew Beeman. The Centre sends Philip and Elizabeth on an operation unlike any they've ever had before, straining their family and marriage to its limits.

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

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

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

As Philip and Elizabeth grapple with a momentous decision, Tuan takes matters into his own hands in the Morozov operation. Back in Russia, Oleg’s investigation collides with the realities of the Soviet system.