Il y a pourtant bel et bien une 3ème personnalité endormie d'après la scène du début de l'épisode 9.
Ce serait tellement con d'introduire concrètement ce concept de monde parallèle/voyage dans le temps/whatever à seulement 2 épisodes de la fin de la série. Je refuse toujours d'y croire.
Whiterose n'est absolument pas fiable, tout comme le point de vue d'Elliot.

La centrale nucléaire, Eliot qui rentre sans soucis (forcément vu l'état de tout le monde...), ça semble être juste une bonne excuse, narrativement je veux dire, pour se lancer rapidement dans le coeur du sujet. Autant l'épisode précédent sur Darlene et Dom prenait son temps, voire terminait l'arc narratif de ces personnages (Darlene qui s'affranchit de ses crises d'angoisse seule, Dom qui lâche prise et qui dort comme un bébé), autant celui là semble se reconcentrer sérieusement sur la psyché d'Eliot (qui me semble être le sujet principal de la série, ça a été dit plus haut).
On boucle même les histoires secondaires de la Dark Army avec l'autre psychopathe écrivain qui confirme que la DA n'en a plus rien à foutre d'eux, leur plan semble être au poil, ils ont réussi les phases précédentes et zou on passe à autre chose.
 
La série semble se débarrasser des trucs "secondaires", les boucler pour plonger dans le vrai sujet : ce qui se passe dans la tronche d'Eliot. Qui a quand même un paquet de trucs à régler vu LA révélation..

je ne vois pas d'autre explication
La série se base essentiellement sur la psyché d'Eliott, mais c'est aussi l'histoire d'un (voire plusieurs) hack...

Ce qui est quasi certain pour moi, comme ça a été dit plus haut, c'est que ce monde parallèle est bien trop lisse et parfait (voire niais) pour être vrai. Je n'avais pas pensé à l'hypothèse "dans la tête d'Elliot" mais ça me paraît crédible quand on prend la série dans son ensemble. J'espère juste qu'on en ressortira avant la fin histoire de ne pas avoir un final trop nébuleux, la série mérite mieux que ça.

Ah et avec cette dernière scène dans la centrale qui pète, il y a un faux air du final des Sopranos avec l'écran de couleur uniforme qui arrive brusquement pour représenter la mort, mais je me fais peut-être des idées.

Edit : Il y a quand même des élements qui vont dans le sens d'une super-simulation de Whiterose qui télécharge les morts, celle-ci a quand même clairement et à plusieurs reprises affirmé que la vie rêvée par chacun était possible, ce qui ne colle pas trop avec la théorie d'un monde parallèle qui n'est pas forcément positif ni créé selon son bon vouloir. Il a aussi invité Elliot à rencontrer en personne Angela, ce qui colle avec son délire de simulation qui accueille les morts.

always browse on here, but I'm posting for the first time because I have an idea I'm pretty confident in. Both universes are simulations and the malware that Elliot installed on White Rose's machine will be the undoing of the F Corp universe.

The F Corp universe appears to be a place where everything works as it should. As Elliot explained, this malware is the same as the E Corp hack. Meaning that the data, or everything in the F Corp universe will be randomly encrypted. The malware is the societal dysfunction of the E Corp world infecting the F Corp world where, again, everything works "as it should". Instead of a loving father, Elliot's dad is quite the opposite. Instead of a philanthropic woman, White Rose is a vengeful man. The malware takes a program running as it should, and corrupts it. What decrypts an encryption? A key. Everyone in the series that has seemed to have encounters with this mysterious "key", Tyrell, White Rose, Angela, young Elliot also provide a way out, or the key to decrypt the malware.

Chronologically, what we are seeing in the F Corp Universe is exactly a year before the events of 5/9. Soon, this universe will be turned on its head by the malware attack. F Corp Elliot and E Corp Elliot somehow manage to broker a deal to alternate with each other, which would explain all of this about a "3rd". The world starts to become very unfamiliar for F Corp Elliot, his memory glitches as his relationships change and people are added and deleted. What we see in Season 1 is Elliot or the multiple Elliots coming to terms with their new reality. This would explain why Elliot had forgotten Darlene, why he was acting so "strange" to Darlene and many other things. The only glimpses that "E Corp Elliot" has of this old life are through his subconscious, a part of him not infected by the new malware. This is why he sees Angela in a wedding dress in a dream in S1, the image of his wife from a past life is his subconscious screaming out at him. Everything in the E Corp universe is malware, most prominently Darlene. This might explain why she relentlessly acts against convention, speaks with no filter, never "following a script". As Elliot came to terms with this new reality, he was angered by it, angry enough to have the meltdown in the server room, leading to his appointment to Krista, in early May of 2014. Somehow, F Corp Elliot's entire life has been infected by the malware, right as everything seems to be going perfectly. This causes glitches, memory gaps, etc, and his life is about to become unrecognizable, in what we now know as the E Corp universe.

The entire universe of the show is essentially, a loop, probably an Alderson Loop which according to its definition is endless due to the fact that an exit condition is unavailable in the "current implementation of the code". But Elliot was able to break the code and discover the malware only when he accepted his father's abuse. This also explains his childhood self "holding the key" to a way out of the loop. Elliot's acceptance of this leads him to Whiterose's machine and a way out of the loop, and the machine sends him "back to the future" to what we see in the F Corp universe. Mr. Robot is noticeably somber as the reactor collapses, and tries his absolute hardest to get him and Elliot to escape to the outside. If Elliot stays and escapes to the F Corp universe, without his history of trauma, Mr. Robot will cease to exist. This might also explain why he tried so hard not to have Elliot's abuse revealed to him, he didn't want him to discover the key. He is only created because of his original trauma, Mr. Robot himself is a kind of glitch. Elliot wakes up in unused suburban land due to the fact that Whiterose, having been born who she was "supposed to be", never holds the vengeance to build the Washington Township plant and so it is just an empty field. As others have theorized, I think Elliot will stumble from Washington Township to NYC, stopping at the Mr.Robot storefront along the way, which would explain the never seen customer. Eventually, he finds himself to Elliot's (F Corp) apartment and the loop begins again.

The version of Tyrell we see is the Tyrell we last saw in the woods approaching a blue light. He too, has entered this alternate universe, which would explain why he's depressed, not shaved, and why he pays so much attention to Elliot both in the Allsafe board meeting and in S1E1 when he goes up to Elliot at his desk. Remember that Tyrell is one of the people that holds a key.

Whiterose herself is likely to have been through the machine multiple times, and strongly believes in it. She only ever builds the machine because of the extreme grief from her past that the malware handed her. But because she's been through so many times and has such faith in it, she'll stop at nothing to escape to the world "as it should be", the Dark Army's shooting people as if they were inanimate objects makes sense in this way, people in the E Corp universe are just meaningless blips in a world not meant to be. Whiterose also keeps insisting to Elliot that the problems of society are not society's fault, she cuts Elliot off when he mentions his malware. If Whiterose already knows about this loop, the malware would be nothing new to her. If the malware is what causes all of the E Corp universe's problems, then she would be right, its not society's fault.

The Angela we see in the F Corp universe is the Angela that departed in S2, the other version of Angela was killed by the Dark Army in the E Corp universe. This is why she was kind of prying Elliot in the F Corp universe, trying to see if the, lets call him "hoodie Elliot" had somehow returned, and knowing the date she would have good reason to think so. (Also I think the conversation between F Corp Elliot and his dad is a total red herring, they just didn't want Angela to find out about the signed book.)

On top of all of this are the references to god. Any simulation needs a programmer, and whoever programs a reality is effectively, its god. The only one is real control is the writer of the program or in this case, the writer of the show. This is where I think the show breaks the fourth wall. As we saw in S4E1, Sam Esmail himself is the only one with the power to truly "kill" Elliot, making him the god. So in this way, the show would be a kind of metaphor for how a TV show is a programmed reality. Elliot was only revived when a CEO did so. This is going out on a limb, but is this a statement from Esmail on the divergence of his original aims for the show versus where corporate interests steered it?

The message overall being, that the E Corp universe, extremely similar to our own, is only as depressing as it is, because the simulation has been infected by malware, shrouding everything that the world could and should be. But as Elliot's speech says, it is those problems that make us who we are, its a code's imperfections that make it what it is. Regardless of how this show ends though its for me, its the greatest drama series of all time. I've never seen anything like it and I doubt we'll see another for a long time. This ending could go anywhere though, and I'm looking forward to it.

C'est un délire de son cerveau et que la série ne part pas en mode sciences fiction

Tout pareil. Je ne suis pas prêt à accepter ce genre de dénouement foireux.
Et je doute honnêtement que ce soit le cas.

celui où Elliott découvre qui est Darlene dans la saison 1, et du coup qui est Mr. Robot ; ou celui où il découvre qu'il n'est pas chez sa mère dans la 2ème, ainsi que la révélation sur le comportement de son père dans la 4ème.

Euh non pas vraiment. C'est plutôt moi qui était sur le bonne voie en disant que tout ce monde parfait était dans sa tête. Même si je n'imaginais pas la chose d'une telle ampleur  
Bien content que ces théories foireuses de voyage dans le temps et autres simulations qu'on voyait apparaître depuis la fin de la saison 2 soient fausses. Je ne comprends même pas qu'elles aient pu avoir autant de défenseurs  

Back to the future, fight club, le jour de la marmotte,...

voyage dans le temps

Pas certain que tu en trouves vu les nombreux passages des saisons précédentes inclus pendant la séance avec Krysta.
Tu te rends compte finalement que c'était bien le Mastermind aux commandes depuis le début de la série.

Les plans sur l'horloge de la mairie .
Je me suis fait non pas voyage dans le temps, puis les plans sont revenus mais j'étais convaincu d'être dans un délire d'Eliot
Me suis gaufrée sur mon idée mais au moins pas sur la Martyfication de l'histoire.

Par contre pas vu le jeu dans l'histoire, il n'a pas des boules de couleurs aux us ?