Glad they finally gave Calvert something interesting to do. Jack's been sucking the fun out of this show for years. Demon!Jack was fun, even if he has WAY too much pertinent plot information and it's transparently a setup for betrayal.
Everything else about this episode felt like the lazy writing and location scouting under Dabb's regime. It doesn't even feel like they're in America anymore, and there's nothing scary about any of it. The ghosts were literally chasing our heroes down the street in the middle of the day? WTF. And bringing back the ghost from Halt & Catch Fire, easily Top 5 worst episodes in the history of the show? Come. On. Lazy.
What I hated most about this episode was the exposition at the end. The boys should have NO idea what's actually going on, what Chuck's motivation is, what he's doing now, and what their mission should be. But because Dabb is such a shitty writer, he has Sam just make a bunch of assumptions and explain the plot of the season to everyone in hopes that we'll all buy into it like it makes any damn sense. And Dean just stands there nodding, because our once great instinctive genius hunter is now basically Sam's dumb assistant, sitting in the car and buying salt while Sam soldiers through a God wound to save a kid. I can't recall actively disliking a writer this much. Not even when Marti Noxon decided Willow's thirst for power was really just an addiction to drugs was I this frustrated with someone butchering a beloved show. It's one of the great tragedies in television history that this sack of crap will pen our heroes' final days.