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

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.