Quick TakeArticle at a glance
- VisionQuest's October 21 episode, "Malware," reveals Tony Stark didn't build J.A.R.V.I.S. and Ultron's code from scratch — Stark Industries bought the breakthrough from a company called Markridge Biotech.
- The retcon also unmasks the episode's AI killer as Jocasta: the digitized consciousness of Markridge co-founder Dr. Josephine Carrington, first teased as a background Easter egg in 2015's Avengers: Age of Ultron.
- In the comics, both Ultron and Jocasta were built by Hank Pym, not Stark Industries — VisionQuest rewires both origins around new, non-superhero scientists instead.
VisionQuest Markridge Biotech is the retcon that changes where Tony Stark’s artificial intelligence actually came from. Episode 4, “Malware,” landed on Disney+ on October 21, 2026, and it reveals that J.A.R.V.I.S., Ultron and Vision’s underlying code all trace back to a biotech company Stark Industries quietly acquired years before Tony Stark ever built a suit of armor.
What Is Markridge Biotech, and What Does It Change?
Markridge Biotech is a research firm introduced in “Malware” as the real origin point of Stark’s AI work. Two scientists, Katarina Wells and Dr. Josephine “Jo” Carrington, led a team that had already cracked the foundations of non-human consciousness before Stark Industries ever got involved. Stark acquired the company’s research rather than inventing the breakthrough himself, and that acquired code is what eventually became J.A.R.V.I.S., then F.R.I.D.A.Y., then Ultron and Vision.
That’s a real change to how the MCU has always framed Stark: as the sole genius behind his own AI. VisionQuest doesn’t erase Stark’s role, but it hands the actual scientific breakthrough to two women nobody in the films ever mentioned.
Who Is Jocasta, and Why Is She Hunting Her Old Team?
“Malware” also unmasks the episode’s android threat as Jocasta, and she isn’t a new character built from scratch, either. She’s revealed to be Carrington’s own consciousness, copied into a machine after Carrington’s death in 2008, and she’s working through her old Markridge colleagues one by one. The show frames it as grief curdling into revenge rather than a generic villain plot, which is the one thing “Malware” does better than simply dropping a lore bomb.
The reveal pays off a genuinely old plant: an AI chip labeled “Jocasta” sat on Tony Stark’s desk in the background of a single shot in 2015’s Avengers: Age of Ultron. VisionQuest is cashing that in eleven years later, which is a long game even by Marvel’s standards.
In the Comics, This Was Always Hank Pym’s Story
This is where the comics-literate version of this story gets more interesting. Ultron first appeared in The Avengers #55 (1968) and got his full origin the next issue: he’s Hank Pym’s creation, built using a copy of Pym’s own brain patterns and turning on his “father” almost immediately. Jocasta is Pym’s creation too — she debuted in Avengers #162 (1977), built from the brain patterns of Pym’s ex-wife, Janet van Dyne.
The MCU films already moved Ultron’s creation to Tony Stark and Bruce Banner in 2015’s Avengers: Age of Ultron, cutting Hank Pym out of it entirely. VisionQuest goes a step further: it hands the actual scientific breakthrough to Markridge, meaning even Stark and Banner’s film-era credit was really just finishing someone else’s homework.
| Character | Marvel Comics origin | VisionQuest / MCU origin |
|---|---|---|
| Ultron | Built by Hank Pym (The Avengers #55-56, 1968) | Rooted in Markridge Biotech’s research, later built by Stark & Banner (Avengers: Age of Ultron, 2015) |
| Jocasta | Built by Hank Pym from Janet van Dyne’s brain patterns (Avengers #162, 1977) | Revealed as Markridge co-founder Jo Carrington’s digitized consciousness (VisionQuest Episode 4, Oct. 21, 2026) |
Why the Retcon Probably Isn’t Finished
Episode 3 already dropped a name that fits this new lineage: Dr. Phineas Horton, the comics scientist who built the original, 1939 android Human Torch — referred to in VisionQuest as “J.I.M.” Nothing has confirmed how Horton connects to Markridge yet, and that’s a theory, not a confirmed fact, but the show is clearly building a wider web of pre-MCU AI research rather than a single one-off retcon.
VisionQuest released its first 4 episodes in 9 days, premiering October 13, 2026 with a two-episode drop and following with “Malware” on October 21. Two more episodes are scheduled for October 28, with the season’s 8-episode run closing November 11, 2026 on Disney+.
Frequently Asked Questions
What is Markridge Biotech in VisionQuest?
Markridge Biotech is the research company VisionQuest introduces in episode 4 as the real source of Tony Stark’s AI breakthrough. Scientists Katarina Wells and Dr. Josephine Carrington cracked the foundations of non-human intelligence before Stark Industries acquired the research.
Who created Ultron in VisionQuest?
VisionQuest traces Ultron’s code back to Markridge Biotech’s research rather than to Tony Stark alone. Stark and Bruce Banner still built Ultron in 2015’s Avengers: Age of Ultron, but the show now frames that as building on Markridge’s earlier breakthrough.
Is Jocasta a villain in VisionQuest?
Jocasta is the android threat unmasked in episode 4. She’s revealed to be the digitized consciousness of Markridge co-founder Dr. Josephine Carrington, hunting the former colleagues she believes wronged her.
Did Tony Stark create Ultron in the Marvel comics?
No. In the comics, Ultron was created by Hank Pym, first appearing in The Avengers #55-56 (1968). The MCU films moved that credit to Tony Stark and Bruce Banner, and VisionQuest has now added Markridge Biotech as an earlier source for the underlying research.
When did VisionQuest reveal the Markridge Biotech retcon?
VisionQuest episode 4, “Malware,” premiered on Disney+ on October 21, 2026.
For more on how the episode plays as television, not just lore, see our Episodes 3-4 review. The full release calendar is in our VisionQuest episode schedule, and Vision’s own comic book history is covered in Vision’s best comic storylines, ranked. Outside coverage: Syfy Wire’s breakdown of the retcon, Inverse on the MCU canon change and GamesRadar’s full episode 3-4 Easter egg list.
