Impressive Explanation
This might be the best explanation of Season 3 I’ve come across. It was just a comment beneath a YouTube video (https://www.youtube.com/watch?v=FPTfaQu5Ju8) by a user named Just Some Guy. Let me know what you think...
Here are my two cents. A recurring theme of TP is the duality and balance of nature and existence: Light and Darkness, Ying and Yang, White and Black, Lodge. On Earth, this balance was disrupted when the A-bomb went off in the Nevada desert in '45 thus causing an inter-dimensional rift to open and release the ethereal demons of Judy, Bob, Mike and the woodsmen who look like Abe Lincoln, among others, into our realm. As a response to this, the Fireman, sent a good, ethereal spirit to counterbalance the evil forces which were released into our world through a gnossis sphere (a deus ex machina-like device). I believe that Laura Palmer, Carrie Page, and even Maddy Ferguson were created in that benevolent spiritual being's image- like humans were supposed to be created in the image of God. Remember, in Ep. 8 the Fireman sends the Laura looking entity/spirit directly after the events of the A-bomb explosion and the release of the demons in Nevada.
In effect, Laura, Maddy and Carrie Page were tulpas of the Laura entity. As explained in the series, tulpa's are thoughtform creations, created by two or more entities. Tulpas, however, seem to be yanked from the world, once they come to the complete realization that they are NOT who they seem to be. That's what happened with tulpa Diane; she realized that she was a copy and that she was imminently going to be ripped from reality. Thus, she probably pulled out the gun to shoot herself (not Gordon and Albert). The effect of being ripped or torn from reality is horrifying and painful: like being about to be killed in a dream state and then waking up from that nightmare screaming, thus, the whole reference in the Monica Bellucci dream about the dreame’s dreaming and the question about who really is the dreamer. This would also jive with what happened to Audrey as the real Audrey probably woke up in a hospital soon after her tulpa sprang the mortal coil. The real Audrey was most likely in a coma from the bomb explosion in the bank 25 years ago. This would also be consistent with the shocked look in Audrey face when she looked at herself in the mirror. She was also wearing a hospital like gown and was in a white room. Bad Coop and some other demons most likely made the tulpa to replace Audrey. I think the main victim, Laura was probably a tulpa too given the fact that she tells James in FWWM that she is not herself and that real Laura was gone long ago.
(cont...)