Stranger Things Season 2: 27 Biggest WTF Moments
12. 450
In the runup to Season 2, the Stranger Things Twitter account had been teasing mystery involving the numbers 450, right arrows, left arrows, and rainbow, sunflower, and cloud emojis.
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It was ultimately all connected to Eleven's mother, and the facility both she and her daughter were kept at. It leads to the frightening reveal that Terry Ives was experimented on too, with some frenzied, disturbing scenes to boot.