Mary is getting her troops in line for phase two of her master plan
And I‘m going to take a moment to praise this. Here we have a strong female character who is, probably, the least powerful of any of them. She isn’t wielding her husband’s influence and name. She isn’t drawing on her wealth. She isn’t using her mighty dark magic. She isn’t a secret samurai navy seal and she doesn’t have a great big axe and nuclear weapon under her skirt
But she is the mightiest, most dangerous and impressive character in these two episodes because of her intelligence, her skill, her determination and her practicality.
You see this from the very beginning when she gathers all her people: Cotton, Sebastian, John and Isaac. Well they kind of just recap Isaac on the whole end of the world thing but he’ got his own stuff going on which is way way way more important than the world ending, anyway. He does make a plea that the people are what matter so why don’t they just abandon the town – but John points out around the town is dangerous. Also releasing demons everywhere is also kind of not a localised event
John and Sebastian are all snarly at each other because JEALOUSY but Mary, being awesome, is focused on task and thinks all of this relationship nonsense can wait until after they’ve stopped the actual world ending, damn it guys.
John tells them about the angel killing dagger that Tituba had him make. Cotton reveals that he has something of a connection with the Sentinel (baby devil’s brother) and may be able to lure him into a hidden place so John can do the stabbing. Unfortunately he’s already got rid of the Red Mercury world-ending stuff and he’s handed it over to the barber/serial killer/pathologist/cannibalism (a combination of professions which may be the Worst Ever) so they need to find that. Sebastian knows where this is so it really really would be time for him to step up and prove his worth but no he’s having a “Mary doesn’t love me” tantrum. More reasonably he’s also having concerns that John fully intends to kill him at some point so he’d quite like to be integral to the plot rather than pass on his useful knowledge and then suddenly being surplus to requirements. Which isn’t wrong
Mary, being suspicious, wants to check in on Tituba and wonder why she’s conveniently handing out angel killing daggers but not using them to kill Baby Devil. Tituba is quick to dance round it – and hide the fact she is the one who stole Baby Devil’s body. Curses Tituba, I wanted to back you – but no matter what he promised apocalypse isn’t worth it!