Stranger Things Season 2: 27 Biggest WTF Moments
15. The Tunnel
Episode 4, much like the fourth episode of the first season, was a biggie in terms of the plot, and it packed a 1-2 punch right at the end.
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Coming just after the Demodog was Hopper's discovery of the tunnels beneath Hawkins, showing us just how far the Shadow Monster had got into this world and how much the lines were blurring between it and the Upside Down.