The final episode of StrangerThings season 4, volume 1 reveals that Henry Creel (Raphael Luce) has psychokinetic powers and, renamed «One,» he was the first child experimented on by Dr. Martin Brenner (Matthew Modine) at Hawkins National Laboratory. At the same time, the episode divulges that One is in fact Vecna, the supernatural serial killer who has been hunting the teenagers of Hawkins, Indiana. While fans now know the origins of Vecna, and of Eleven's (Millie Bobby Brown) powers, there is little information provided about where Henry Creel got his own psychokinetic abilities in the first place.
In 1959, Henry Creel framed his father, Victor Creel (Robert Englund), for the murder of his mother and sister. Around the time that his family moved to Hawkins, Henry began to develop supernatural psychokinetic abilities. A quiet child, he found more in common with black widow spiders than with humans, and slowly he grew to hate humanity. He began to push the limits of his powers by killing small animals and torturing his family by infecting their minds with horrific visions and traumatic memories. At some point after killing his family, Henry was committed for study at Hawkins Lab.
Related: How Max Really Escaped Vecna (It Wasn't Just The Music)
Stranger Things previously established that the powers exhibited by Eleven and her super-powered «siblings» were the results of the CIA's Project MKUltra experimenting on expectant mothers by injecting them with LSD. Season 4 somewhat retcons this by revealing that the children's powers were the results of Dr. Brenner trying to recreate Henry Creel's abilities. Stranger Things does not explain where Henry Creel's powers come from in season 4, volume 1; however, as there is no
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