Is Hopper alive?
According to actor David Harbour, yes. He told SlashFilm that the Russian’s American prisoner is most likely Hopper, who was presumed dead after the Russian’s dimension-piercing drill exploded at the end of season three. We never saw his body, however, and when the same device malfunctioned at the beginning of the season, it turned the technicians operating it into goo. Stranger Things isn’t a series to tone down the gore factor, so the absence of Hopper’s body is a pretty substantial clue.
Who will return for Stranger Things 4?
It’s pretty safe to assume that the main cast of the series will be back, so we can likely expect Millie Bobby Brown (Eleven), Finn Wolfhard (Mike), Gaten Matarazzo (Dustin), Noah Schnapp (Will), Caleb McLaughlin (Lucas), Natalia Dyer (Nancy), Winona Ryder (Joyce), Joe Keery (Steve), Sadie Sink (Max), and Charlie Heaton (Jonathan) to return for the new season. Also likely to return are Robin, a fan-favorite season three addition to the cast played by Maya Hawke, and Erica (Priah Ferguson), Lucas’ younger sister.
Of course, Hopper’s (David Harbour) return is still up in the air, but it’s probably a fair assumption that he’ll be back in some capacity.