Philip and Elizabeth discover that their murdered colleague Robert had a wife they never knew about. As they try to determine what she knows and where her allegiance lies, Stan's investigation into Robert's death puts him hot on their trail.

A mole hunt within the KGB causes suspicion amongst allies and shatters trust within the Jennings' marriage. Meanwhile, Stan's plan to keep his mole safe puts her at even greater risk of discovery.

Philip and Elizabeth are put to the test when a routine mission goes horribly wrong. Stan and the FBI are pushed to their limit when one of their own goes missing.

One of Elizabeth's agents has key intel for sale, but she and Philip find themselves taking increasingly greater risks for what could well be a set-up. Meanwhile, Stan's pursuit of Directorate S suddenly begins to yield unexpected results.

When Philip and Elizabeth are ordered to go through with a meeting that could potentially be a set-up, they find themselves confronted with unexpected truths about their relationship. Stan's investigation puts him and the FBI even closer to Philip and Elizabeth.

As Philip investigates the fallout from the last operation, Elizabeth sticks close to home, concerned for her family until she gets a mysterious distress signal. Meanwhile, a walk-in arrives at the Rezidentura - providing both Nina and Stan with unique opportunities.

Philip and Elizabeth are finally assigned a new handler as Philip works to clean up the mess of the last operation and Elizabeth, in disguise as Clark's sister Jennifer, does her best to smooth things over with Martha. As Stan searches for a missing scientist, Oleg and Arkady continue to argue over how best to handle the situation on their side, leaving Nina once again caught between the FBI and KGB.

Philip uses his agent Charles Duluth to help him gain access to an early precursor to the Internet so that the KGB can bug American government communications. Nina faces the threat of a potential FBI polygraph exam, bringing her closer to KGB colleague Oleg.

Philip and Elizabeth both find themselves faced with painful turns in their various missions. Stan fights to gain access to an American military program that could give him the upper hand in his battle of wills with Oleg.

Philip and Elizabeth’s long-planned mission turns ugly, impacting each of them in different ways. Stan digs in deeper at work as his personal life continues to unravel.

Elizabeth makes a shocking discovery about Kate. Philip pursues a contact for information about stealth. Stan continues his pursuit of the illegals.

No one is safe as Philip and Elizabeth evacuate their children while trying to complete the mission. Stan holds Nina's future in his hands.

Elizabeth and Philip come together to deal with a mission gone wrong but struggle to reconcile their increasingly opposing ideologies. Stan welcomes a Soviet defector, Zinaida, to America. Nina acclimates to her new living arrangements.

Philip juggles the many women in his life while Elizabeth takes drastic measures to complete a mission. Stan asserts a plan to save Nina with an unlikely ally.

Philip and Elizabeth feel the weight of a new family secret while following up on the KGB’s interests in South Africa. Stan faces struggles both at work and at home. Martha confronts a shocking development.

Philip and Elizabeth deploy a plan for the C.I.A.’s Mujahideen visitors. Tensions at the Jennings’ home escalate.

Elizabeth and Paige take a trip that lands them in treacherous territory. After an emotionally charged mission, Philip turns to an unlikely source for solace. Stan’s plan to save Nina culminates in unforeseen ways.

Philip and Elizabeth deal with the fallout of all they’ve wrought. What will happen when the FBI finds out about Gene’s suicide? How will Pastor Tim deal with the revelation that they are Russian spies? And will they be able to handle a dangerous, new bioweapons assignment?

A devastating flaw during a mission forces Philip, Elizabeth, William and Gabriel to confront the depths of their patriotism… and their mortality. In Russia, in striving to be a better person, has Nina put her life on the line?

The KGB and the FBI both race to track down a vital agent… everything is at stake.

When Paige’s long-ago indiscretion threatens to resurface and destroy the family, Philip and Elizabeth find themselves scrambling – and Paige finds herself reevaluating who her parents really are.

Philip and Elizabeth are in a high-stakes race against the FBI to recover a hazardous package. Will they get there in time? And will Paige follow her parents into the family business?

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.

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.

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.

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.

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

Elizabeth targets an old source who could tip the balance of the upcoming summit, as Philip deals with business at the travel agency. Stan learns an old friend is back in town.

With the arms control summit under way, a shocking revelation from Philip throws Elizabeth - and her work - into turmoil. Stan follows a dangerous hunch.

In the series finale, the Jennings face a choice that will change their lives forever.