Crane, Mills, and Parrish (again, in retrospect: NO NO NO NO NO NO) head off to the Hellmouth -- sorry, the gateway to Purgatory -- while Jenny stays behind to try and solve that riddle Moloch told at the end of "The Golem": "The Saint's name is a sign. When you know my meaning, War will take form. Then the end of days begins!" All this while, the Witnesses have also been trying to ignore another one of Moloch's proclamations -- that Ichabod will deliver Abbie's soul to the demon. It's true that there's a prophecy saying one Witness will renounce the other, but Henry has reassured Abbie, noting that "prophecies have a way of fulfilling themselves if you let them." Sage advice for any character in a story, even if it was delivered by a secretly evil apocalyptic horseman.
But I'm getting ahead of myself. After a final warning from Henry -- Purgatory is a maze of temptation; no matter what you do, don't pull a Persephone -- they tumble headlong through a computer-generated gateway apparently imported from Once Upon a Time... and into scenarios pulled directly from their deepest desires. Abbie finds herself in an alternate reality where Corbin's alive, John Cho hasn't been zombified, and she's at the top of her class at Quantico. Ichabod is dropped into 18th-century Oxford, where his stately father (Victor Garber!!) informs him that the British have defeated the American colonists, Ichabod never switched sides, and now he's been granted a full professorship at his alma mater. Interesting that Katrina doesn't factor into this scenario at all; maybe Purgatory can't conjure her up because she's physically trapped there already?
There are a few heart-stopping moments when it seems that Abbie and Ichabod will fall victim to their tempters. In the end, of course, they rally and make it to the next stage of the maze -- that spooky twilit wood in which we've seen Katrina before, now populated also by terrifying creatures from Bosch's Garden of Earthly Delights. Fortunately, it doesn't take long for them to make their way to the echo of the church where Katrina gave up Baby Crane -- and luckily, the witch is inside. Great; fabulous; wonderful; now let's get the hell out of here! Of course, there turns out to be a catch: Katrina tells the Witnesses that she can only leave this prison if another soul stays behind in her place. Geez, lady -- you couldn't have told us that before the dramatic rescue? Ichabod's been having visions of you like, once an episode! Get it together!
And thus Moloch's prophecy is fulfilled: Abbie declares that she's going to stay behind and face her demons (figurative and literal). Katrina gives her a protective amulet, then skedaddles with her hubby -- but not before Ichabod solemnly swears to return for his dear lieutenant: "Remember our bond. I'll come back for you." Katrina, internally: "Huh. Should... should I remind him I'm standing right here?"
NEXT: WHAT? HOW? OH MY GOD! HOLY F---!