After the truly epic end to Supernatural's fifth season, it seemed difficult for the sixth season to go any bigger - but somehow, Supernatural managed it. Season six sees Sam return (of course - any fan knows that a Winchester never really dies), and the brothers face off against Eve and the original monsters, while a battle rages for control of Heaven.

Related: Supernatural: The Best Episode In Every Season, Ranked

For some fans, this is where the show started to take a bit of a downturn, but the ratings on IMDb are still impressively high - the worst episode of the season still manages to score a 7.7, while the best reaches 9.6. And that best episode is a fan-favorite from the entire series, as Supernatural steered into the comedy side of things and went a little bit meta.