Stephen Colbert and Jimmy Fallon had a good run these past six months, having a great friendship with a built-in expiration date. But all good things must come to an end, especially when you set up that end ahead of time. So with the clock run out on their six-month friendship, it’s only natural that they’re now mortal enemies for six months. But let’s be honest, they’ll share a common enemy this Sunday night at the Emmy’s: Jon Stewart. But after that, it’s right back to focusing white-hot hatred one each other.