Bye-bye Summer, hello Fall! September ushers in a new season, bringing plenty of changes along with it. We'll be welcoming the return of our favorite TV shows with open arms, while sifting through the new offerings with a discerning eye. Acclaimed author J.K. Rowling is ready to unleash her first post-Potter book on us, and Mumford & Sons and The xx give us some new tunes to rock out to. On top of all that, we've got not one but two award shows to look forward to. Take a look at all of our must haves in the entertainment world for September.