Ok, maybe the OP was a little vague, or even glib.
I bring it up here because it is a show about inter dimensional travel, NDEs and a handful of other things that might interest people here.
But... here is something to chew on:
(SPOILER ALERT): It is chocked full of amateurish plot holes and exceptionally lazy and thoughtless writing; as one - among MANY - examples: the OA makes an old family recipe for her captor: HE buys all the ingredients for it from a grocery list that HE makes (he even tells us so in the dialogue), then he WATCHES her make it, then has an anaphylactic attack after tasting and nearly dies, telling her after that he is DEATHLY ALLERGIC to - TOMATOES... ???!!!????
Ok, for good measure, one more: They are in isolated chambers and cannot touch each other, yet she manages to scarify her her back with complex symbols between her shoulder blades - even if years of yoga had made her EXCEPTIONALLY flexible, there are no mirrors in the cells for her to see what she is etching in an impossibly unreachable place... H
How does any of this get by: two writers, several producers and execs, the execs at Netflix (who funded the script), the makeup artist, the actors, and EVERYONE ON SET??!! Infuriating that this sloppiness can get serious money...
And yet another one: in the last episode the sheriff comes to visit to ask Dr Hap if he will help his ailing wife. The Dr hears him knocking, disarms the alarm and unbolts several locks from the door, establishing that NO ONE gets in without him letting them in, EVER. In the very same episode, the sheriff WANDERS INTO the SUPERSECURE holding, without tripping the alarm, and SURPRISES Dr Hap by sneaking up to him and putting a gun to his head... (??!!??)
There is at least one of these per episode.
JBArk
JBArk is a Mandelthought; a non-fiction character in a drama of his own design he calls "LIFE" who partakes in consciousness expanding activities and substances; he should in no way be confused with SWIM, who is an eminently data-mineable and prolific character who has somehow convinced himself the target he wears on his forehead is actually a shield.