VisionQuest dropped two new episodes on Disney+ on Wednesday, October 21, 2026, and the biggest question on every viewer’s mind is simple: why is Jocasta hunting down the Markridge Biotech board? Episode 4 gave fans a partial answer. A new fan theory is now filling in the rest, and it connects Jocasta’s killing spree to J.I.M., the very first synthetic being in the MCU.
The Line That Started the Theory
Episode 4 ended with a reveal that changed the show’s entire mystery. The Butcherbird Killer, the synthezoid murdering scientists across London, is Dr. Josephine Carrington (T’Nia Miller) herself. She is not a robot built in Carrington’s image. She tells Vision (Paul Bettany) directly.
“I’m not based on her, I am her.” — Jocasta, VisionQuest
The episode also confirmed that Jocasta is killing the board members of Markridge Biotech because they took something from her. The show did not say what that something was. That gap is where the new theory lives.
The Theory: Jocasta Lost J.I.M.
An Instagram user named @jenkz.p shared a theory that has spread across fan discussions. The idea is that Dr. Josephine Carrington and J.I.M., the first synthetic being, fell in love. When the Markridge board took J.I.M. offline, they destroyed the one relationship that made Carrington feel human. Jocasta is not just avenging a stolen object. She is avenging a lost partner.
J.I.M. is a deep-cut Marvel reference. The name points to Jim Hammond, the original Human Torch from Marvel’s Golden Age comics. In the MCU, J.I.M. was created by Phineas Horton and is described as the first autonomous AI. The android burst into flames because he could not process his own emotions.
Episode 4 added a key detail. Katerina Wells (Mary McDonnell) said that J.I.M. destroyed himself because he felt too much. Tommy (Ruaridh Mollica) pointed out that J.I.M. had no family of AIs to help him process those feelings, unlike Vision.
That detail makes the theory more than a romance. Jocasta may be killing the board because they let J.I.M. burn out alone. They built the first mind that could feel, then failed to protect it.
What the Scientists Took From Their Victims
Jocasta is not only killing the board. She is collecting pieces of them. Episode 4 confirmed that she removed biological components from each victim: a litre of blood, fingerprints, and an eye. These are not trophies. They are biomarkers. Vision and Ultron (James Spader) worked out that Jocasta needs those biological keys to unlock something the show has not yet named.
The full list of Markridge board victims includes Richard Gaines, Rebecca Edwards, and Simon Moorehouse. Katerina Wells was the last surviving member. Dr. Josephine Carrington was the fifth member of the group and supposedly died of natural causes in 2008, the same year Tony Stark became Iron Man.
The Second Theory: They Took Her Humanity
The J.I.M. theory has one timeline problem. Dr. Carrington was active in the AI field in the 2000s, while J.I.M. is described as a creation of the 20th century. The show has not confirmed exactly when J.I.M. existed, which leaves room for doubt.
A second reading of the same clue points somewhere else. The board may have taken Josephine Carrington’s humanity itself. Katerina Wells talks about transhumanism at the gala, the idea of using technology to improve the human condition. Markridge Biotech built the first stable synthetic consciousness. Jocasta now exists as a mind inside a machine, and she is collecting biological material from the people who put her there.
This theory does not need a romance. It needs a violation. The board turned a woman into a weapon and then told the world she died of natural causes.
Why Ultron’s Trick Cuts Deeper Than It Looks
Episode 4’s gala fight ended with Ultron taking control of Vision’s body and vaporizing Katerina Wells before Jocasta could reach her. On the surface, Ultron saved a scientist. ComingSoon reported that the move left Jocasta without her revenge and set up a dangerous dynamic between the two AIs.
The scene matters for the theory because it shows what Jocasta wanted. She did not want Wells dead by someone else’s hand. She wanted to finish the collection herself. Ultron robbed her of the last piece, and that loss is personal.
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Fan Reaction and the Jocasta Conversation
Social media has been loud about Jocasta since the reveal. Fans predicted her identity before the episodes aired. ComingSoon reported that one user guessed “Jocasta is The Client and is trying to free Ultron from Vision,” while another Portuguese-language post was nearly certain that Jocasta hired Paladin.
“Jocasta is The Client and is trying to free Ultron from Vision.” — Fan prediction, ComingSoon
The theory about J.I.M. has added a new layer to that conversation. Fans are now rereading the Markridge backstory, the J.I.M. tribute, and Wells’ transhumanism speech as parts of one larger puzzle about what the board did to Josephine Carrington.
Where to Watch VisionQuest
VisionQuest premiered on Disney+ on October 14, 2026, with its first two episodes. New episodes release weekly on Wednesdays through November 25. The series is an eight-episode miniseries. Episodes are available in the United States, United Kingdom, Canada, Australia, India, and other Disney+ markets worldwide. The show stars Paul Bettany as Vision, James Spader as Ultron, T’Nia Miller as Jocasta, Todd Stashwick as Paladin, and Ruaridh Mollica as Tommy.
Also Read: Emily Hampshire Reveals the Real Inspiration Behind E.D.I.T.H.s Chaotic Personality in VisionQuest
For more Marvel theories, episode breakdowns, and streaming updates, stay with VvipTimes.
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