Darkness降临，末日降临，Dean见到了Darkness——Amara，她要毁灭世界来报复上帝。Dean因该隐之印与她有所联系而无法下杀手。
这一季诸多配角十分出彩，Crowley与女巫Rowena的剧情线相当值得一看。

The Creepy. The Demented. The Unexplained. The Unearthly. Sam Winchester grew up hunting such terrifying things. But that’s all past. Law school beckons him. So does safety and normalcy. That is, until Sam’s estranged brother Dean appears with troubling news: their father has disappeared, a man who’s hunted evil for 22 years. So to find their father, the brothers must hunt what their father hunts…and Sam must return to the life he’d rather leave behind.