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'Stranger Things' Season 2's Least Popular Episode Served a Purpose, Say EPs

Stephanie Topacio Long

The Duffer brothers can't always keep "Stranger Things" fans happy, but there is a method to their madness.

The series creators were on hand to discuss Season 2 during Vulture Festival LA on Saturday, and fans brought up the most controversial episode yet: Episode 7, "The Lost Sister." It was a chapter -- spoilers ahead! -- that saw Eleven (Millie Bobby Brown) leave Hawkins and embark on new (mis)adventures in the big city with her "sister" of sorts.

The episode was not universally well-received, and it inspired tweets like the following: