What do you do after finishing a five year storyline that was originally meant to conclude with the show's demise? If you're the CW's Supernatural - which returns for a sixth season with a brand new showrunner replacing creator Eric Kripke - then the answer is apparently "reveal the backstory of the show's monster mythology."
Kripke - who'll stay on as, he says, "a safety net" for new showrunner Sera Gamble - told Entertainment Weekly that, even though the series may have exhausted the story potential of angels and demons, there's much more left to do:
[T]he great undiscovered country of Supernatural is kind of right in front of our face: creatures and monsters. We have had so many creature episodes but we haven’t actually explained where they came from—[similar] to the way we have explored angels and demons. How do they feel about the situations they are in? Are they from here? Where did the first ones come from? How did werewolves and vampires and shape-shifters all begin anyway?
Fans shouldn't worry that favorite characters won't be seen again as the show shifts direction, however; Kripke added, "Castiel will be there. Crowley will be there. The beloved characters will be threading into the story... This is a show that ends story lines and starts new ones and reinvents itself. I think because it is hardwired into the DNA of the show, it will weather a lot of transition and growth. The question is not should it have ended, the question is, Is the new story line compelling and interesting and is it an arena of this universe that we haven’t explored yet and is it putting Sam and Dean into new situations that we haven’t seen before? I think it does all of the above."
The sixth season of Supernatural debuts in September.