Series II takes place in the late 50's and early '60's and deals with the political and social upheaval taking place both in England and around the world. On the political scene, events such as the Suez Crisis, the Kennedy assassination, and the Profumo Affair are causing turmoil. Meanwhile, the 1960's are becoming a time when social mores are being overthrown and even the tradition-bound royal family is not immune from the effects of this. On the family scene, Elizabeth and Philip have two more children- Andrew and Edward- while still struggling to maintain (not terribly successfully) a functioning family while constantly in the public eye. Margaret continues to make a train wreck of her life, and Elizabeth's slimy uncle, ex-king Edward, tries to worm his way back into the family firm.
The only episode I didn't like was the one about the relationship between Margaret and her soon-to-be husband Anthony Armstrong-Jones, which left me feeling like I needed a bath. Sadly, their general sleaziness and degeneracy is, if anything, understated. Ew.