Netflix is taking its subscribers inside the production and opening of "Stranger Things: The First Shadow," the successful London (and now Broadway) play that serves as a prequel to the streaming service's immensely popular sci-fi series.

On the day of the first preview performance of “Stranger Things: The First Shadow” on Broadway, Netflix has announced a new documentary charting the TV phenomenon’s successful adaptation into a hit stage play.

Stranger Things: The First Shadow Gets Netflix Behind-the-Scenes Doc Dropping on April 15th, Netflix's Behind the Curtain: Stranger Things: The First Shadow takes us behind the scenes of the London production.