1. A Very Supernatural Christmas
Why it's on the list: Who doesn't talk about the Christmas episode? It's legendary. Sure it's a flashback episode, but it's all new information even to the most die hard fan. It's a heartbreaking story for these boys who were often left alone even at Christmas by their monster hunting Dad. It's the sort of thing any viewer can get easily sucked into.
This is one of the most perfect scripts the series has ever had. It's a roller coaster of laugh out loud funny parts, total horrifying gore to the backdrop of perfect Martha Stewart style Christmas living, a MOTW that has to be the most memorable ever (Ozzie and Harriet are cannibal Pagan Gods?), and a tear jerking look at Christmases past and present that reinforced that no matter how bad the Winchester boys had it, they have each other and that's all that matters. It's one of the few warm endings ever done on this show and easily the most memorable. The set decorators soared to amazing new heights with this episode as well. It's no surprise that "A Very Supernatural Christmas" often makes the best episodes of Supernatural list.
Favorite scene: While I can easily cop out and say "every single one," how can I not say the final scene when Sam gives Dean his final Christmas. We had just learned that Dean received his precious amulet from Sam as a Christmas gift when he was 12, so as Rosemary Clooney's "Have Yourself A Merry Little Christmas" comes on, the first thing we see is adult Dean still wearing the amulet to this day. He enters to see Sam with a tree laced with fishing lures and pine tree air fresheners. He's got some seriously spiked egg-nog, and they both got meager presents for each other at the gas mart down the road. They don't have a lot of words to say. Just smiles as they kick back, drink their egg nog and watch the game together. It all closes with the perfect picture postcard, Sam and Dean through the window while Christmas lights shine off the Impala in the snow. This beats any Hallmark or any other warm and fuzzy holiday program I've ever seen.
Okay, that's my list. What's yours? Please share what you think was missed and why it makes your list.