Philip and Elizabeth disagree over handling orders from the Centre; 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.
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.
Gabriel has surprising information; Elizabeth begins to take family matters into her own hands; Stan receives upsetting news from his past and turns to Sandra for support.
Martha and Clark's marriage meets its most challenging test yet; pressure on Philip intensifies; Elizabeth turns to Gabriel with a difficult request; Nina receives a new assignment that reconnects her with her past.
Elizabeth and Paige take a trip that lands them in treacherous territory; Philip turns to an unlikely source for solace; Stan's plan to save Nina culminates in unforeseen ways.