The beloved Crawleys and their intrepid staff prepare for the most important moment of their lives. A royal visit from the King and Queen of England will unleash scandal, romance and intrigue that will leave the future of Downton hanging in the balance.
As the Iranian revolution reaches a boiling point, a CIA \'exfiltration\' specialist concocts a risky plan to free six Americans who have found shelter at the home of the Canadian ambassador.
