hi, i'm curios regarding one things, Windowm is possessed by Bob? in the scene with Leo, the face of Windom is white. It means that it is possessed?

another two question is.....in the last episode, in the Black Lodge wee see Caroline an Coop on the floor...died, why they are them?I think that caroline never has not entered in the Lodge first.Then when Caroline speaks with Coop has the eyes white means that it is a doppleganger.

..then we see windom that it speaks coop and annie that watches them and then to svanishes what means?

White face Windom is just kooky & practicing his Kabuki.   As for Caroline in the Lodge, I think that's just messin' with Coop, just like they're messin' with us!!!

Then when Caroline speaks with Coop has the eyes white means that it is a doppleganger.

..then we see windom that it speaks coop and annie that watches them and then to svanishes what means?

 I'm pretty sure that Caroline/Annie/Laura in that scene are all just Windham trying to confuse Cooper and weaken him emotionally, by the taking the form of the three loves of his life (past, present, and future loves, and they appear in that order btw). That's how I see it anyway.

I always thought that it was the lodge itself that manifested as the characters for it's "test" that it gives to the "dweller on the threshold"? Correct me if i'm wrong.

 I just thought it always depended on the person entering the lodge to discern what experience one would have. Like, if i went in there and saw caroline, i wouldn't be phased at all, not knowing her and all, but if i saw my ex-girlfriend in there i'd run like wildfire. Maybe even throw something; whatever.

Is possible that Windom Earle was possessed by his doppelganger in another conjunction of Jupiter and Saturn?  Windom Earle may have begun searching for the black forces in the 60's and I think maybe is possible.

Is possible that Windom Earle was possessed by his doppelganger in another conjunction of Jupiter and Saturn?  Windom Earle may have begun searching for the black forces in the 60's and I think maybe is possible.

 it is a reasonable hypothesis since it tries search the black lodge from the 60's. but him is a doppelganger in the scene with Leo? in those moment is probable that Windom is possessed but we see its white face only in this close up

another two question is.....in the last episode, in the Black Lodge wee see Caroline an Coop on the floor...died, why they are them?I think that caroline never has not entered in the Lodge first.Then when Caroline speaks with Coop has the eyes white means that it is a doppleganger.

..then we see windom that it speaks coop and annie that watches them and then to svanishes what means?

In the vision of Caroline and Coop, neither are dead. It's supposed to look like the Pittsburgh stabbing transposed over the Lodge. Caroline is probably not in the lodge. Since they kind of fade in and vanish, I interpret it to be not real. Cooper's Black Lodge experience is a kind of bardo world (a Buddhist/Theosophist thing) and he's having these "karmically created" "terrifying hallucinations" (to quote Wikipedia). These either lead to enlightenment or the fear they cause leads to a "less than desirable rebirth." 

When I first saw that scene I thought Earle had just come back from the grove and presumably made contact with some entity.  The previous episode had shown BOB tearing his way into the world, so I figured he and Earle had met.  The finale has Cooper ready to make a pact with Earle in exchange for Annie.  I have to wonder if BOB tricked Earle with a similar Devil's Bargain, betraying him once he entered the Red Room.