The first teaser for Season 4 of Stranger Things is out and it looks like  Hopper is alive,  although he’s a prisoner of the Russians.  The show’s creators say, quote, “He is imprisoned far from home in the snowy wasteland of Kamchatka, where he will face dangers both human . . . and other.  “Season four is shaping up to be the biggest and most frightening season yet, and we cannot wait for everyone to see more.”   There’s no word yet on a premiere date.