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.

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. Stan tries a new approach to mending his marriage with Sandra amidst learning tough news about Nina.

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'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.

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.