Phillip and Elizabeth Jennings are two seemingly normal Americans who are really undercover KGB agents. After kidnapping a Soviet defector they discover their new neighbor is an FBI agent assigned to their case.

After President Reagan is nearly assassinated events quickly start to spin out of control. The FBI wonders if the KGB is somehow behind it; the KGB worry that they will be blamed for it and possibly result in war.

Philip and Elizabeth's troubled marriage is further tested when a mission to discredit a Polish pro-democracy leader reunites Philip with his old flame.

Philip and Elizabeth must stop an assassin from taking out key US scientists, while Stan and the FBI hunt the same man. Grannie shocks Elizabeth with the truth of what happened between Philip and Irina in a New York.

Phillip and Elizabeth shock their children when they announce they are separating. After Amador goes missing, Gaad orders an unauthorized mission to grab a KGB agent in retaliation. Events soon spin out of control and come to a grisly end.

Events in Moscow strike a personal chord for Elizabeth, leading her to take on a dangerous mission she can't complete without Philip's help, and placing the couple on a collision course with both Grannie and the FBI.

An Air Force colonel offers to sell SDI secrets to the KGB. Viola reports the bug in the Weinberger home. Phillip agrees to marry Martha hoping she'll continue spying while Nina confesses to spying for the Americans.

Elizabeth and Phillip are at risk of getting caught when they fear their assignments may be a set-up. Stan is convinced he'll find Nina a way out.

A dangerous Naval officer becomes the key to Philip and Elizabeth's mission as well as a potential threat to their family's safety. Lucia, a Sandinista intelligence officer working with the Jennings, is tasked with getting Elizabeth access to Capitol Hill. Stan struggles with the potential costs of protecting Nina.

With Larrick closing in, Elizabeth rushes to exfiltrate Jared while Philip readies Fred for a crucial mission. Arkady finally plays his hand, forcing Stan to make an impossible choice.

Gabriel has surprising information; Elizabeth begins to take family matters into her own hands.

Philip and Elizabeth feel the weight of a family secret while following up on the KGB's interests.

Philip must consider his life with Martha and make a crushing choice from which there is no coming back.

The Centre rushes to prepare Martha's exfil as Directorate S agents try to locate her but, it seems that a backup transport was also ordered. FBI tears up the Clark Westerfeld apartment. Martha almost walks into the FBI dragnet. Philip is overcome with self-recrimination...KGB may kill Martha. The FBI intercepts a call to Martha's parents from Woodley Park and stake out the area. Philip gets a call from Rock Creek Park; Elizabeth races to reach her and brings her in bruised but alive. Oleg does not know why backup transport was ordered. Gaad waxes philosophical about his FBI career in flames as the Jennings kids drink beer with Stan's son. Philip is finally honest with Martha, over Elizabeth's objections. Martha knows that she will be completely alone in Moscow. Will tomorrow's plane carry one rat or two? Or will Martha bite the Valium bullet and refuse to be forced to defect and commit further treason?

The Day After premieres, making the stakes - and terrible consequences - of the Cold War plain. Even with that in mind, will Elizabeth be able to complete the painful process of the "Patty" operation?

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.

As Paige deals with last episode's trauma, she sees her mother in a new light... and finds she has inherited some of her parents' skills. Plus, has Oleg reached his breaking point with Stan?

In the season 4 finale, Elizabeth & Philip race against the FBI to retrieve a mysterious package. Paige finally begins considering whether or not she would like to enter the family business.

After witnessing Elizabeth kill two men, Paige trades in church for training sessions with mom. First, self defense. Second could tear the family apart. The beginning of the end for Paige and Matthew looms.

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

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.

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.