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.

A crucial agent crumbles under emotional distress and threatens to topple a valuable network of KGB informants.

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 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.

After Amador's murder the FBI begins a massive manhunt for the killer. When they start closing in on Gregory, the KGB decides to send him to Moscow. Despite Elizabeth's best efforts he refuses to go, even if it means his life.

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.

Elizabeth comes back from her injury and straight into what should have been a routine mission - but it goes awry, leaving her and Philip in fear not only for themselves but for their whole network... and family. Paige's suspicions have only grown in her mother's absence. Meanwhile, Stan continues to fall for the Russian agent who has started to play him.

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 complete their next mission - but not without complications - and Philip's fears about Elizabeth's readiness for action deepen. Stan tracks the KGB walk-in which leads to much praise at work and a deepening of his attachment to, and dependence on, Nina. Meanwhile, Paige snoops into her mother's family background and Oleg begins to scrutinize Nina's secret operation.

Just when Philip and Elizabeth think they have a quiet road ahead, an old friend returns to complicate things. Not only do they have to intercept a target who could prove valuable to the Soviet Union, but they also have to take on an important rogue mission without the support of the Centre. Divisions inside the Rezidentura deepen between Oleg and Arkady, and there's an upheaval at the FBI as the chickens come home to roost for Agent Gaad. Meanwhile, Martha's frustrations threaten to blow Philip's cover.

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.

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.

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.

A new mission with international stakes has Philip calling on Annelise for assistance just as an old foe returns to D.C. with a vendetta. Stan makes a discovery that could put the FBI hot on the trail of illegals.

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

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.

Nina finds that her future is in Stan's hands. Meanwhile, Paige and Henry are moved to safety as their parents attempt to complete their assignment.

Tensions simmer between Philip and Elizabeth as they disagree over handling orders from the Centre. When Elizabeth loses key intel, Philip enlists Annelise on a mission with an unexpected outcome.

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

Danger mounts for Elizabeth and Philip as they get closer to the inner circle of the CIA Afghan Group.

Philip faces a moral dilemma while developing an asset. Philip and Elizabeth's friction escalates. Stan develops a theory with serious reprecussions for national security. Paige makes a surprising birthday wish.

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.

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.

Martha and Clark's marriage meets its most challenging test yet; pressure on Philip intensifies.

Philip and Elizabeth struggle with the gravity of unexpected collateral damage.

Philip and Elizabeth deploy a plan for the C.I.A.'s Mujahideen visitors.

Philip and Elizabeth's home and work lives collide in new and dangerous ways. Nina struggles to figure out her next steps. Arkady assigns Oleg and Tatiana to an operation with uncertain potential.

Martha hosts an unexpected guest; Philip and Elizabeth must work a formidable Mujahideen commander.

Elizabeth and Paige take a trip that lands them in treacherous territory.

Elizabeth and Phillip are supposed to get a biological weapon sample but fail to make the exchange when someone is watching. Nina works Anton in hopes it will lead to her freedom. Paige wonders if she can trust Pastor Tim with her secret.

Philip tries with increasing desperation to get rid of a sensitive and dangerous package as family tensions in the Jennings House reach a boiling point when Paige shares a secret of her own.

Paige copes with new burdens that come with her family's secret - as Philip and Elizabeth struggle to contain their cover without destroying their daughter.

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?

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

Martha must finally face the truth she has denied - and her life may never be the same. Plus, a chilling new development in William's work forces the Jennings to face the realities of what a biological war would mean.

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 Jennings hit their breaking points as they try to handle their local agents such as Martha.

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

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

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?

Martha must finally face the truth she has denied - and her life may never be the same. Plus, a chilling new development in William's work forces the Jennings to face the realities of what a biological war would mean.

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

Martha and Clark's marriage meets its most challenging test yet; pressure on Philip intensifies.

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

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.

Martha hosts an unexpected guest; Philip and Elizabeth must work a formidable Mujahideen commander.

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

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

Elizabeth and Phillip are supposed to get a biological weapon sample but fail to make the exchange when someone is watching. Nina works Anton in hopes it will lead to her freedom. Paige wonders if she can trust Pastor Tim with her secret.