WARNING: If you don't want to know what happened in this episode, don't read this photo recap!
The Earps have broken free of Bulshar's sway... for now. And they've got Bobo in solitary confinement. They're waiting for him to unfry his noggin and tell them something useful about the demon-in-chief's plan to destroy the world.
And while Wynonna is getting consoled by her firefighting side piece, the two of them are alerted to a newcomer named Kevin, who's arrived to Pergatory to help them save the world. Talk about timing. Kevin is an emissary from an elite, supernatural fighting force dispatched to help the merry band of misfits fight Bulshar. Let's see if it works.
Charlie gone, the Earps and this stranger can get down to work. Bulshar's severed arm is still down the mine where he was buried. Get the arm, defeat the Bulshar. But it's gonna take a whole lot of muscle.
Nicole has managed to talk Doc into helping her track down this Maeve character, and squeezing from her whatever she knows. Of course, Maeve is dead, and her spirit persists. So while they're snooping around Maeve's old abode, looking for a special book that they can use to defeat Bulshar, the spirit of Maeve leaps out of the fire and... into Nicole.
Once inside Nicole, Maeve tries to coerce Doc into finding her a fresh corpse to possess — or she won't give up the book. Doc doesn't know if killing an innocent person is worth all this. So he phones Jeremy for some backup.
When Wynonna and Waverly show up at the mine, they find a lone Revenant protecting it. And look: he's got Bulshar's arm attached to his shoulder. We're going out on a limb here, but if that Rev doesn't kill the Earp sisters, they might just get what they're after.
But Maeve won't give up that easily. She commands Nicole's body to hold a gun against her own head! Of course, Nicole has strong feelings about this, and attempts to resist... from within. Or at least she tries, before Maeve sets the house on fire.
Wynonna and Nicole take refuge at Mercedes's place, but the Rev follows them there. During a brawl, Waverly discovers that she can control Bulshar's arm with Bulshar's ring... which is on her finger. So she uses her powers to the fullest.
And after the Earps pry Bulshar's arm from the Revenant's body, Kevin tells them that it's worthless, it's not the weapon. It was a test and they passed - yay! And Waverly? She's the one. Neo status up in here.
The book in hand, Jeremy, Robin and Nicole start their research. Turns out Bulshar, before he took human form, was the snake from the Garden of Eden. Charlie, Waverly's father, was the angel protecting the garden (obvi he didn't do too good a job at it). It would take 120 years or so for the time to be right for the garden to become vulnerable to another incursion... and that's coming up. Also, Robin gave Bobo his headphones, and he's blissing out on jazz.