The writing on the show, which has been pretty good until the last couple of episodes, has suddenly found itself caught in this weird rut where half of the major characters are now frequently experiencing visions or hallucinations, and it's becoming OTT and ridiculous.
It's probably because they wanted to include Jennifer Connelly but ended up almost writing her character out of the show at the end of last season. So, having backed themselves into that corner, they felt the best way to give Connelly screentime was to have her character appear in vision form. Fine, I guess, although why they felt the need for two different characters to be seeing her in this way I don't know. But having done that you can't have any other characters also having visions otherwise it just becomes ridiculous, as it is here.
So we have:
Alex - getting hallucinations of Melanie.
Layton - getting ridiculous messiah-like visions of African trees and a 'new eden'.
Javier - getting PTSD visions of Wilford's dog.
Wilford - also getting hallucinations of Melanie.
And on top of that we also have:
Zarah - having PTSD flashbacks of the events in her makeshift refuge.
Alex - having flashbacks of her dead friend and Wilford.
Which character's next I wonder?