Rewatched Part 4.
The prison interview is a trove of cryptic unresolved comments. Did Mr. C actually leave messages for Jeffries letting him know it's safe? Safe from what? Was Jeffries planning on crossing over? Did he tell Mr. C he was planning on crossing over, but was lying? The true nature of the Mr. C / Jeffries dynamic is one of the most tantalizing things for me about season 3 (yeah, I guess I'll start calling it that). While I want to know more, I do think the amount of info we got preserves the perfect amount of mystery.
What does "I've never really left home" mean? There are a lot of cryptic references to "home" this season, but the question of where/what Cooper's home is is left unresolved. (I know it's tempting to say it's Twin Peaks, but he only spent a month of his life there. Of course, the town did make a profound impact on him. Perhaps the way Part 18 ends is truly a "you can't go home" metaphor on some level?)
Albert's "blue rose" reference takes on a deeper meaning in light of the Part 14 backstory. Presumably, they think Mr. C is a tulpa...so close, yet not quite on the mark, so much as the distinction matters.
Again, the Jeffries/Albert backstory remains pretty vague. It's still not even clear if this happened before of after Jeffries disappeared. I have to imagine it's after, as Cooper murdering an FBI agent (or being in touch with Jeffries) before the original series seems unthinkable. And given the later revelation that Gordon and Coop had a specific plan to infiltrate the supernatural world, it makes some sense that Albert wouldn't be particularly shocked by having Jeffries contact him re: Coop, or that Albert would still treat the two as active agents with high level clearance. But why in God's name wouldn't he have told Gordon about this contact? Maybe the Colombian agent turned up dead almost immediately afterward, and Albert was covering his tracks? And who actually contacted Albert? The real Jeffries? Whoever Mr. C called from the hotel room (see my musings in the Part 1/2 thread)? And why on Earth did this supernatural entity care about killing an FBI agent? Perhaps most importantly, why would the FBI -- a domestic organization -- have a "man in Colombia"? Perhaps he was infiltrating the CIA, as Denise did with the DEA?
I noted in another thread how odd it is that Parts 3&4 self-consciously dollop on references to the old mythology (the owl, Sycamore St., Arthurian allusions) one on top of the other, only for the rest of the season to ignore those elements.
The little frightened-puppy jump Kyle does when the limo door opens the door is beautiful. So much subtle work from him this season. The limo driver actor is great too, a bit put-out but so warm and kind at the same time.