No rest for the Winchesters! Out of the Darkness, Into the Fire picks up right from the end of Season 10, with the arrival of the primordial Darkness (from "before time").
The Darkness manifests itself to Dean as a sultry woman (Emily Swallow), not only thanking him for setting her free, but also referencing their 'connection' via The Mark of Cain (which clearly still has a big part to play in the ongoing story of Supernatural).
And in no time at all the Winchesters find themselves trapped in a nearby hospital, with attractive young deputy sheriff Jenna Nickerson (Laci J Mailey) and a newborn baby, besieged by 'rage zombies' spawned by The Darkness.
Dean is all for killing as many zombies as they can to fight their way out, but Sam suggests a more restrained approach and the need to try and find a cure for the infection.
Meanwhile Crowley's inner demon has slipped away from his old meat suit and taken over a frustrated housewife (Kirsten Robek), while Castiel surrenders himself to the agents of Heaven.
Blending moments of existential horror with comedy, Out of the Darkness, Into the Fire felt like a return to form for Supernatural, after a particularly shaky season, throwing the Big Bad in the Winchesters' faces from the get-go, addressing their violent tendencies, and ramping up the jeopardy for both Sam and Dean in very personal ways.
The absence of Rowena from this episode certainly helped, even if she was wearing down my dislike towards the end of last season, but sadly from the trailers I see she's coming back (and she was mentioned a couple of times in this episode).
The final scene in Crowley's court, with references to Michael and Lucifer in "the cage", was full of foreshadowing, with Crowley dismissing The Darkness as a "fairy story" to scare baby demons.
It'll be interesting to see how long Supernatural can maintain the intensity of this episode, without all the characters self-destructing.