WARNING! Spoilers ahead for Stranger Things season 4, vol. 1!
Stranger Things season 4’s Number One/Henry Creel reveal was the most shocking twist so far, with Dr. Brenner’s Soteria chip adding an even deeper meaning to the experiment. While Eleven was the only character known to have powers until she met Kali, aka Eight, in season 2, Stranger Things revealed that at least 17 children were part of Dr. Martin Brenner’s Hawkins Lab experiments. These children with psionic abilities all showed varying levels of strength in their talents, with One and Eleven being revealed as the most powerful. However, while Eleven typically only uses her powers to fight the Upside Down, One uses them for far more sinister pursuits.
For the majority of Stranger Things season 4, Jamie Campbell Bower is portraying a friendly orderly in Eleven’s flashbacks to Hawkins Lab in 1979. However, it’s revealed that he was actually the powerful test subject Number 1 in Dr. Brenner’s project, whose abilities were inhibited by a chip embedded in his neck called “Soteria” after he had murdered his family. Eleven removed the device after believing Stranger Things' Henry Creel to be an innocent prisoner of Dr. Brenner like herself, though would regret this moments later when he slaughtered everyone in Hawkins Lab.
Related: Stranger Things' Number 1 Fully Explained
Dr. Brenner’s name for One’s power suppressant device actually has a much deeper meaning for his experiment and treatment of Henry Creel. The name Soteria refers to the Greek goddess or personified spirit of safety, who is also associated with deliverance and preservation from harm. As such, Stranger Things’ Dr. Brenner labeling the chip “Soteria” was meant to symbolize its functionality as a
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