Netflix has officially announced the premiere date and released a compelling trailer for its previously unannounced documentary, "One Last Adventure: The Making of Stranger Things 5." This feature-length film, directed by Martina Radwan, is set to debut globally on January 12 at 12:00am PT, offering an inside look into the years of effort and craft that went into the final installment of the Duffer Brothers’ generation-defining series.

Martina Radwan, acclaimed for her work on documentaries like "Tomorrow, Tomorrow, Tomorrow" and an Emmy winner for her cinematography on "Girls State," shared her profound gratitude and experience. "I’m endlessly grateful to the Duffer Brothers for trusting me with a front-row seat to this incredible journey," said Radwan. She described spending a full year on set as a "true privilege—and an absolute thrill," finding "pure joy" in watching the beloved show come to life. Radwan expressed a wish to have documented earlier seasons and highlighted the remarkable generosity and openness of the cast and long-time collaborators, emphasizing how the Duffer Brothers' process inspires everyone to constantly push boundaries and represents everything she loves about filmmaking.

The Duffer Brothers themselves revealed their motivation behind creating such a detailed behind-the-scenes film. Growing up, they were inspired by the on-the-ground documentaries for 'The Lord of the Rings,' which revealed the real nuts and bolts of massive productions. They noted the decline of this type of behind-the-scenes storytelling with the decrease in physical media and aimed to bring it back. They stated that "One Last Adventure," beautifully captured by Radwan, is their attempt to do just that, inviting both 'Stranger Things' enthusiasts and anyone curious about how a major Hollywood production comes to life to watch.

The documentary's trailer provides an emotional glimpse into its content, beginning with snippets from the final table read of "Stranger Things." Ross Duffer's voiceover shares the challenge of "Writing the last lines these characters would ever say," while Matt Duffer recalls the profound impact of writing "End Series." This moment is shown accompanied by the emotional reactions of Noah Schnapp and Millie Bobby Brown, who are seen crying on a couch, with Schnapp nuzzling Cara Buono (Karen Wheeler). The trailer further showcases stills of the young cast from the show’s earliest days, set to David Bowie’s iconic song “Heroes,” which was also featured in the series finale.

Further insights from the documentary reveal scenes from the writers’ room, where the Duffer Brothers and their team grapple with critical storyline decisions, including the fate of central characters like Eleven. Millie Bobby Brown's voiceover poignantly states, "I’m not ready to let go," underscoring the deep emotional connection to the series. The trailer culminates with a powerful moment from the final day of filming, where Ross Duffer declares, "And that is a wrap on ‘Stranger Things,'" as confetti falls from the ceiling. This documentary promises to meticulously capture how the complex narrative, character arcs, and the intentional ambiguities of the series' conclusion were all intricately put together.

"One Last Adventure: The Making of Stranger Things 5" is a MakeMake Production, produced by Angus Wall, Terry Leonard, and Kent Kubena. Fans globally can anticipate this final victory lap for the series before the Upside Down door closes for good, as it premieres on Netflix on January 12.