Fifty years ago, it was the Summer of Profumo in London, commencing with a ministerial resignation that brought down a Conservative Prime Minister, Harold Macmillan, and eventually his successor, Lord Home, too. Half-a-century on, it remains Britain's most famous sex scandal, and sufficiently potent that later this year Andrew Lloyd Webber, Don Black and Christopher Hampton will unveil their West End musical on the subject. Here's what I had to say, with a personal reminiscence of the lady involved, in my obituary of John Profumo. This essay appears in my book Mark Steyn's Passing Parade: