Duffer Brothers Reveal Key Difference Between Dr. Brenner and Dr. Kay in Stranger Things

In the first part of Stranger Things season 5, Dr. Kay, played by Hamilton, was revealed as a new villain. She’s established a military base in the Upside Down to help her track down Eleven (Millie Bobby Brown). Her intense interest in Eleven and others with similar abilities is reminiscent of Dr. Brenner’s experiments with the children.


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