Sam and Dean's story in Supernatural started out well and tight. The two brothers become demon hunters, having been traumatized after a demon killed their mother when they were young and Sam's girlfriend in the now at the beginning.
The main storyline takes place around the beginning and the end of the seasons and the mid is filled with a "monster of the week" type episodes. The two of them gradually get involved in the battle between Heaven and Hell.
The ideal finale comes about the end of the fifth season but the fans were so many that the TV station didn't want to quit on its high rating. As a result, new storylines start springing up, some insignificant events from the old seasons get overblown and as a whole – all sorts of gimmicks start taking place just so in order to milk the dried out universe.
