[TheDoughboy]

If you look on tvdb you'll see it's there (http://thetvdb.com/?tab=series&id=251965&lid=7) you could name it:

Ken Burns' Prohibition - 01x01 - A Nation of Drunkards

or

Ken Burns' Prohibition - s01e01 - A Nation of Drunkards

I use EpNamer - http://www.epnamer.com/ and it will auto rename the files for you.