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The Stranger Things: Six prequel comic may have revealed who opened the Upside Down. 1 / 8

Netflix's Season 1 hinted it was Eleven, after MKUltra's constant experimenting. 2 / 8

Now, we find out it may have been another test subject, Six, in the '70s. 3 / 8

Six has precognitive powers and after experiments, she punched her bookshelf. 4 / 8

This apparently opened a rift through which the Demogorgon stuck its hand. 5 / 8

She thinks it's a vision. However, later on we see the creature is probing again. 6 / 8

It seems Six notified it of Earth, and Eleven brought it over in the '80s. 7 / 8

This hints we might see other monsters as well in this precursor story. 8 / 8