Watch David Harbour Breaks Down Stranger Things Fan Theories from Reddit, Fan Theories

David Harbour, one of the stars of "Stranger Things," breaks down fan theories from Reddit. Is the Upside Down the future? Did the US government drop an atomic bomb on Hawkins? Are demogorgons descendants of human beings? Is Steve the real father of Jean Ralphio from Parks and Recreation? David offers his perspective on these questions and theories.

Stranger Things 4 Will Wrap This Summer, Confirms David Harbour

See what David Harbour did there? : r/StrangerThings

Stranger Things': David Harbour Might Be Dropping Clues About

Best Stranger Things Season 4 Theories, Predictions, Plot Ideas

This 'Stranger Things' Fan Theory About Vecna Changes Everything

Stranger Things 4: Is Eleven's real dad 001/Henry Creel? The

Stranger Things' star on Will's sexuality: 'It's up to the

Stranger Things season 4 volume 2: release date and more

Video] David Harbour Addresses the Wackiest Stranger Things Fan

David Harbour (Sheriff Hopper) weighs in on Stranger Things fan

Stranger Things 3 could see Hopper get possessed and the gang

Watch David Harbour Breaks Down Stranger Things Fan Theories from

These 'Stranger Things' Season 4 Theories AreWhoa - PureWow