Philip and Elizabeth attempt to deal with the consequences of their actions as they attempt to complete a new bio-weapons assignment.
A stunning new development in Wiliam's work causes the Jennings to face the dangerous realities of a biological war.
The FBI and the KGB battle it out to try and locate an important agent.
An indiscretion made by Paige in the past threatens to be exposed and it could destroy the family.
Elizabeth finalizes the final few steps of a personal mission.
Paige starts to see her mother in a whole new light.