He even sang back-up vocals on good friend Steve Carlson's albums "Spot in the Corner" and "Rollin' On." In the summer of 2008 Jensen traveled to Kittaning, PA to film the horror/thriller movie, My Bloody Valentine (2009), which was filmed in the cutting edge Real D technology, Jensen played the lead role of Tom ...

Well, it's both a big connection, but also it might surprise you just how much you need to know in order to understand the series. Here's what you need to know about how The Winchesters connects to Supernatural and how much mythology you really need to know about it.