Facts About Stranger Things

The series got the greenlit before the script was completed

When the Duffers were trying to pitch the show to different networks, the script itself wasn’t completed, but instead they had a 20-page pitch book on ideas for the show and potential episode concepts.

When Netflix bought the whole show, they picked it up purely based on the pitch ideas with no concrete script in place. From this, many of the roles on the show were cast as they went along with the series.