With Elizabeth in a new role, Philip tries to assert some power. Churchill wants to delay the coronation. King George’s disgraced brother arrives.

As the Soviets test the H-bomb, both Churchill and Eden have major health crises. Angry about her inadequate education, Elizabeth hires a tutor.

Margaret and Peter are reunited, but another obstacle stands in their way. Elizabeth is torn between her duty as Queen and her love for her sister.