The final season of Netflix’s blockbuster show “Stranger Things” is kicking off today, well over nine years after the show premiered on the streaming platform.

And as Salon reports, producers had to resort to some visual trickery to wind back the clock for the show’s rapidly aging cast. In a new five-minute preview of the upcoming season, actor Noah Schnapp’s character, Will Byers, had to be digitally de-aged to retell the story of what happened when Will became trapped in the Upside Down, a shadowy parallel universe, in the show’s first season — but this time, from Will’s perspective.

In other words, the now 21-year-old actor had to look like his 10 or 11-year-old self. According to Deadline, young actor Luke Kotokek had to stand in for Schnapp during filming. Then, Schnapp’s digitally

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