The First Shadow,' a prequel play that centers on a young Henry Creel, brings the Upside Down to life in a truly jaw-dropping ...

The play, written by Kate Trefry and executive produced by the Duffer Brothers, brings an original story to the stage and also ties into the next season of the streaming series.

Over 17 years and dozens of movies and TV shows, Marvel Studios has made a series of meaningful retcons to the MCU.