The royal family mourns the passing of Winston Churchill. The United Kingdom ushers in a new prime minister, the Labour Party's Harold Wilson whom Prince Philip and Queen Elizabeth hear might be a Soviet spy.

While Princess Margaret and Lord Snowdon visit the USA, the queen, at the bidding of Harold Wilson, asks them to make a side trip to Washington, D.C. to ask President Johnson for financial assistance for the United Kingdom.

Left without a home by a political coup in Athens, Philip's eccentric mother, Princess Alice of Greece, is invited to live in Buckingham Palace by the Queen.

The 1969 moon landing occasions a mid-life crisis in Prince Philip, who thinks of the adventures he has missed as the Queen's consort.

As her marriage falls apart, Princess Margaret finds solace in the arms of a much younger landscape gardener. The Queen and the nation celebrate Elizabeth II's Silver Jubilee.