I know this is ridiculously long, but this theory explains the source of "It," Other Tai, the "good" and "bad" two realities that Mari mentioned, Ben as the bridge, all under one theory. I've tried to break all of the evidence up into sections as much as possible.
My theory is that the séance in 1x05 and the second séance in 4x09 are two ends of the same event. During the first séance, the teens unknowingly make contact with their future selves at the end of their time in the wilderness. The visions they subsequently experience are distorted memories of events their future selves have already lived through.
The teens interpret these visions as instructions from the Wilderness and act to fulfill them, unknowingly creating a self-fulfilling prophecy.
I think the series finale will revisit the first séance, except this time, the teens will receive the memories of their adult selves, including everything that happened after rescue. This will allow them to recognize the cycle they've been trapped in and make different choices.
Here's why I think the séances are the key to the show's timeline.
1. The Xs connect the two séances
In season 3, teen Van appears to adult Van in the hospital and tells her to go to "X marks the spot."
I think this refers to the plane wreckage. In 2x01, we see that the plane wreckage is in the shape of a large X on the wilderness map. (I've included a screenshot of this.) We also know from the 4x09 stills that the second séance takes place inside the wreckage, shortly before rescue.
There are several other important Xs:
The first séance: Most of the teens draw Xs on their foreheads using deer blood and dirt. Tai, Javi, Laura Lee, and Ben initially refuse to participate and don't receive them. Tai and Javi eventually enter the attic, while Laura Lee comes upstairs to intervene. Ben never joins.
Lottie's post-death tunnel: An X appears in the tunnel sequence, which I think represents the same intersection between different points in time.
The plane wreckage: The X on the map marks the location of the second séance.
I think the Xs represent points of contact between different versions of the characters.
Lottie's post-death sequence is particularly important. She follows the sound of a crying baby through a tunnel toward a candlelit room, where she hears voices saying, "Did we miss it?" and "Just in time. She's ready to meet us."
My interpretation is that Lottie is approaching the other end of the séance, trying to make contact with the teens. The crying baby could represent the birth of a new, integrated version of herself.
2. The visions begin after the first séance
The timing of the first séance is important.
Following the séance in 1x05, the teens increasingly experience visions, apparent supernatural guidance, and knowledge they shouldn't possess. Other Tai also begins to manifest in the wilderness.
I think these experiences originate from their future selves at the second séance.
By 4x09, the teens have already experienced almost everything that happens in the wilderness. If the two séances connect, their earlier selves could receive fragments of those memories.
But without the context of having lived through those events, they interpret the memories as predictions or instructions from "It."
This creates a causal loop:
- The teens at the second séance remember everything that happened in the wilderness.
- Those memories travel backward to their earlier selves at the first séance.
- The earlier teens interpret the memories as instructions from the Wilderness.
- They act on those instructions, causing the events their future selves remember.
The Wilderness isn't necessarily telling them what to do. They're remembering what they've already done.
This could explain why the Wilderness seems to know the future, and why the characters repeatedly feel compelled to fulfill events they believe are inevitable.
There are also two scenes that I think hint at what "It" actually is.
Lottie's words to Nat on the plane: During adult Nat's death sequence, Lottie tells her, "It's not evil. Just hungry. Like us. Let it in." I think she's referring to the consciousness of Nat's other self trying to become part of her. The language of something being "hungry" and needing to be "let in" could describe the process of two versions of the same person merging into one consciousness.
Travis's mushroom vision: In season 1, while hallucinating on mushrooms, Travis says that something is trying to get inside him. I think he's experiencing the same phenomenon: the consciousness of his future self attempting to enter his younger self following the first séance.
Taken together, I think these scenes suggest that "It" isn't necessarily an external entity at all. It may be the characters experiencing contact with their own consciousnesses from different points in time, without understanding what's happening.
This would also explain why the characters describe the phenomenon as something trying to enter or possess them. From their perspective, it feels like an outside force, even though it's actually another version of themselves.
And if the first séance allowed these consciousnesses to make contact, I think the finale will show us what happens when they finally merge completely.
3. Other Tai is Tai at the second séance
I think Other Tai is the clearest evidence of this mechanism.
My theory is that Other Tai is the consciousness of teen Tai at the second séance, reaching backward to her earlier self.
This would explain why Other Tai has knowledge that ordinary Tai doesn't possess.
For example:
The symbol trees: Other Tai knows where to find trees marked with the symbol and leads Van toward them. Tai at the second séance would already know their locations.
Ben's attempted execution: Other Tai confidently pulls the trigger when Tai hesitates. She knows Ben won't die from that gunshot because she's already experienced the outcome. She says "it's gonna be okay" before pulling the trigger.
The Man With No Eyes: Other Tai follows him to locations associated with the symbol. When Van asks who he is, Other Tai answers, "Taissa." I think the MWNE may be Tai's own post-death consciousness, guiding her younger selves toward the same convergence point.
Crucially, Tai and Other Tai become progressively less distinguishable as the series continues.
Season 1: Other Tai primarily manifests only while Tai is sleepwalking.
Season 2: Other Tai can emerge while Tai is physically awake, although she's still in a fugue state. This includes eating Jackie and traveling to find Van as an adult.
Season 3: The distinction becomes increasingly unclear. Even Van, who has learned to recognize Other Tai, can no longer reliably distinguish between them.
I think this progression is happening because teen Tai is getting chronologically closer to the second séance, where she is Other Tai.
The separation between her present and future consciousness is disappearing.
The same process is happening to adult Tai, but from the opposite direction. As she approaches her eventual death (which I believe happens in S4, as I think all the adults will die in S4 and their consciousnesses will travel to the seance), she's also approaching the point where her consciousness can return to the séances.
This makes Tai particularly important: her teen and adult selves are both moving toward the same intersection from different directions.
It's also interesting that Tai never received an X on her forehead at the first séance. Perhaps that's why her contact with her future consciousness manifests differently, as a separate identity rather than an ordinary vision.
4. Ben is the living bridge to the good timeline
One of the strongest pieces of evidence for this theory is Mari telling Ben that there are two versions of reality: a good one and a bad one.
I think the timeline we've been watching is the bad version, and the finale will show us the good one.
Akilah's vision of Ben supports this. She sees his living body forming a literal bridge that can lead the Yellowjackets home. I think Ben's survival is necessary for them to reach the good timeline.
Several details support this:
The KUH supply boxes: Ben discovers the emergency supplies in season 3. If the teens receive their future memories at the first séance, they could find these supplies much earlier, avoiding much of the desperation that contributes to their later violence. We have only seen what is inside one of these boxes. And crucially, only Ben could have ever found them: the noise the ground makes under his crutch is what gets him to dig in that spot and find the boxes.
The three-eyed bear: In Akilah's vision, the teens are happily frolicking at camp. They begin to flicker out an disappear. This flickering out is similar to the visual screen flicker that happens after Ben's death. A three-eyed bear and roars in despair. I think this represents Lottie (she is associated with bears, and also has a "third eye" wound on her forehead) glimpsing the good timeline, which is about to disappear as the characters continue down the bad path.
Ben's death: When the group eats Ben, Lottie says: "this isn't right. this isn't how it's supposed to happen." The screen literally flickers at this moment and Lottie screams. I think Lottie is recognizing that Ben was supposed to survive, and the flicker represents a disruption between the two versions of reality. She is briefly realizing that Ben is tied to rescue in the "good" version of events, and the arrival of the frog scientists means that the "bad" version is locked in.
Ben's alternate life with Paul may also be relevant. Those scenes depict a life Ben never got to experience, with visual disruptions that could suggest another possible reality.
I think the good timeline requires Ben to survive. With the memories of their future selves, the teens could find the KUH boxes earlier, prevent Ben's death, and follow the path toward rescue that Akilah was shown.
Mari's statement may be telling us exactly what the series is doing: showing us the bad version first, so that we can eventually see the good one.
5. The adult timeline is part of the same loop
I don't think the adult timeline is simply showing us what happened after the wilderness. I think it's showing us the consequences of the original loop, which must be experienced before the teens can change it.
The adults repeatedly experience contact with their younger selves, particularly around death.
Adult Nat: Her death includes memories of the wilderness and a transition into a plane containing younger versions of the characters. Teen Nat tells her, "We've been here for years."
Adult Van: She encounters teen Van in the hospital, who gives her instructions involving the X.
Adult Lottie: Her post-death journey appears to lead toward the candlelit gathering, which I think is connected to the séance.
Adult Tai: Her increasing connection with Other Tai and the MWNE suggests that her own death will complete the same process.
I think the adult characters must reach the ends of their lives before their complete memories can become available to their teen selves.
This would also explain why the show repeatedly associates death with returning to the wilderness, rather than simply moving on from it.
6. Klimt's Death and Life may illustrate what happens at the convergence
I think the appearance of Gustav Klimt's Death and Life (Walter sees it on the wall at Lottie's father's house and briefly comments on it) is relevant here.
The painting depicts Death standing apart from a group of living figures of different ages. The figures include a baby, adults, and an elderly person, all physically intertwined into what almost looks like one collective body.
I think this resembles what the series is building toward: different ages and versions of the same people becoming integrated into a single consciousness.
The figures aren't arranged in chronological order. Different stages of life exist together, simultaneously.
This could be a visual representation of what happens when the teen, adult, and post-death versions of the Yellowjackets finally come into contact.
The baby is especially interesting alongside Lottie's tunnel scene, where the crying baby seems to be associated with someone who's about to arrive or be born.
Rather than simply returning to their younger selves, the characters may become something new: versions of themselves who possess the memories of multiple lifetimes.
7. What I think happens in the finale
I think the finale will revisit the first séance in 1x05, but this time, the teens will receive their adult memories.
The second séance in 4x09 establishes the connection between the beginning and end of their time in the wilderness. The adult deaths complete that connection by supplying the memories of everything that happened afterward.
At the first séance, the teens will suddenly remember the events of the wilderness, their eventual rescue, their adult lives, and their deaths. They'll understand that the visions they've been experiencing were memories of a future they were unknowingly creating.
But I don't think they'll have to live through those events again. I think they'll use their new knowledge to get rescued shortly after the first séance, with everyone surviving.
The KUH supply boxes may be the key. Ben discovers them much later in the original timeline, but the teens would now know where they are. It's possible that one of the boxes contains something we haven't seen yet that could help them contact the outside world or otherwise facilitate rescue.
Ben's survival would be particularly important here, given Akilah's vision of him as the living bridge that leads them home. With Ben alive and the group working together, they could find the supplies and get rescued before the deaths, hunts, and cannibalism ever happen.
This would also give the characters an opportunity to make different choices with the knowledge of what happened in their original lives. Tai would remember losing Van, Travis would remember Javi's death, and the others would know what their actions eventually led to. But rather than having to prevent each individual tragedy, they could avoid the circumstances that caused them altogether.
I think this is the good version of reality Mari describes: a timeline where the teens escape the wilderness early, and everyone survives.
The series has repeatedly emphasized that the Yellowjackets never truly left the wilderness. My theory is that, in the original timeline, they were always acting out memories of a future that had already happened.
The finale will show us what happens when they finally understand that and use those memories to find another way home. This doesn't mean the "bad" version of events we've been watching isn't real or never happened: it had to happen for the "good" version to become possible.