Spoiler alert! If you haven't seen Season 5 of "The Walking Dead" yet, you should watch it immediately and then come back to watch this hilarious "Cheers" theme recap. It has all you need to know heading into Season 6, and in the perfect sing-along style. Don't be surprised if this gets stuck in your head until the premiere on Sunday night (at 9/8c on AMC). More Original Video: 'Would You Rather?' Season 1 Finale
