Supernatural tells the story of Sam and Dean Winchester, two brothers raised from childhood to be nomadic hunters of supernatural phenomena. When Sam was six months old and Dean was four, something otherworldly killed their mother in a housefire. After that, their father John became obsessed with the paranormal and took to hunting evil across the backroads of America while teaching them the tools of the trade along the way. For awhile, Sam turned his back on hunting and lived a normal life attending college at Stanford University and building a healthy relationship with a girl named Jessica. But that all came to an end when Dean showed up on Sam's doorstep asking for help after their father disappeared on a hunt. Today, the brothers travel from town to town investigating the demonic and the paranormal while continuing John's quest to find what killed their Mom.
Sometimes the stories are based on actual urban legends, such as the Lady in White, Bloody Mary, or the Hookman, but more often than not Supernatural will take pieces from folk lore, classic mythology, ghost stories, etc. and put them in a new context.
The show premiered on YTV on Sep 6th, 2005 and started on the WB a week later. Generally, there are 22 episodes in any given season with seven to nine episodes focused on the mythos while the rest are standalone episodes. Three seasons have been completed so far and the fourth begins in September 2008.