Star Trek: Deep Space Nine has often been regarded as the outlier of the Trek family of shows, a series that did things differently. It never had the same level of mainstream success as its predecessor, The Next Generation, and yet it has grown over the years to be regarded by many fans as perhaps the best of the Star Trek shows.

And now, a new documentary about the history of Deep Space Nine is heading to theaters. What We Left Behind: Looking Back at Star Trek: Deep Space Nine will be released by Fathom Events in more than 800 movie theaters in the U.S. on Monday, May 13. And IGN has the exclusive debut of the film's trailer -- watch it above!We've also got the poster for What We Left Behind. Check it out:

The film will be in more than 800 movie theaters nationwide on Monday, May 13, at 7:00 p.m. local time.

Tickets for What We Left Behind: Looking Back at Star Trek: Deep Space Nine can be purchased beginning Friday, April 12 at www.FathomEvents.com and participating theater box offices.

The film presents a fascinating in-depth look at the past, present, and future of a series whose dark, edgy take on Gene Roddenberry’s vision was often misunderstood when it premiered, but has grown into a beloved mainstay in the Star Trek franchise.

Featuring extensive new interviews with the cast and crew of Star Trek: Deep Space Nine as well as newly remastered HD footage from the television series, What We Left Behind also focuses on the original writers of the series as they craft a brand-new episode of Star Trek: Deep Space Nine, developing what would be the eighth-season premiere if the show were to return to the air today.

Following the feature presentation, a taped roundtable discussion with directors Ira Steven Behr, David Zappone, and the film’s producers will provide audiences with a comprehensive look at the making of the film, the show’s fans and the series’ ongoing appeal to Trekkers of all ages. Fathom attendees will also receive an exclusive double-sided poster with the theatrical poster art for What We Left Behind on one side, and an original illustration from the film on the other. (Quantities limited, while supplies last.)

That's Ira Steven Behr, showrunner and executive producer of Deep Space Nine and co-director of the documentary. If you're a fan of DS9, you can likely thank him for it!The makers of What We Left Behind launched an Indiegogo crowdfunding campaign in February 2017, with a goal of raising at least $150,000 in order to license clips and edit existing interviews. Within a day they beat that goal and after a month they had brought in $647,000 thanks to 9,500 backers -- a new record for documentary filmmaking on Indiegogo and surely a testament to the love of DS9 that fans still possess.Some more details on the doc, via Fathom Events, including how to get tickets:

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