Whisky or Whiskey? The Great Spelling Controversy

I've heard people defending why you should spell whisk[e]y with an "e" and without an "e" - but I haven't heard anyone give me a good explanation of where these two spellings originated or why each has found its own hooks in certain countries. So in this episode, I'll take a look at the origins of the word and see if we can determine the best way to navigate this spelling minefield.