In the tradition of interweaving character drama and the supernatural in such hits as "Smallville," a completely new kind of thrill ride takes viewers on a journey into the dark world of the unexplained in "Supernatural." Bound by tragedy and blood to a dangerous, otherworldly mission, two brothers travel from the Colorado wilderness to the Nebraska farmlands and on to the isolated Wisconsin lakes, encountering creatures that most people believe only exist in folklore, superstition and nightmares.