As Philip and Elizabeth struggle to contain the risks from Paige's growing relationship with Matthew Beeman, the Centre sends them 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. Philip and Elizabeth face a new mission with devastating implications for their country.

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

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.

Philip and Elizabeth receive surprising news about Henry - and shattering news about a past operation. Stan might be falling in love, but Philip wonders if something darker is going on.

Gabriel stuns Philip and Elizabeth with a sudden announcement and a crushing revelation about Philip's past. Stan and Aderholt draw a fly into their web, while Oleg and Ruslan ambush their first suspect.

As Paige becomes even more enmeshed in her parents' world, tensions with Matthew Beeman come to a head, Philip and Elizabeth's honeytraps take surprising turns, and Stan faces the consequences of overplaying his hand at the FBI.

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

Philip and Elizabeth are thrown off balance when things with Tuan take an unexpected turn. Henry makes a startling proposition and Stan has a disturbing encounter with Frank Gaad's widow.

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

A surprise assignment from the Centre divides Philip and Elizabeth, forcing them into a moment of profound crisis. Stan gives Henry a tour of the FBI.

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.

Philip and Elizabeth race against the clock as a life hangs in the balance, while Stan faces an uncertain future.