The DC Comics movie universe is now finding its feet after the overwhelming success of Wonder Woman, and new fans are joining the DC fold. Recent comics converts have probably been pleased to see that there’s plenty more DC content to consume, including an expansive animated universe encompassing multiple TV series and hundreds of episodes. For the last few years, Netflix subscribers had access to three of those series (Justice League, Justice League Unlimited, and Young Justice)–but that won’t be the case much longer.

All three DC animated series are leaving Netflix on August 1, meaning you have just a few days to cram in as many episodes of the sprawling superhero universe as you can. This is a major blow for superhero enthusiasts, as these cartoons served as a gateway to the larger DC Universe for an entire generation of fans. After 80 years worth of comics and a half dozen hard reboots, the DC Comics universe has become almost impenetrable to even hardcore comics readers (I’ve always been a Marvel guy, and I’ve spent 25 years trying to wrap my head around DC continuity). These cartoons streamlined the DCU while still maintaining its massive scope; for many fans, the animated versions of these characters seen in the ’90s Batman and Superman animated series and later in Justice League and Unlimited are the definitive ones.

If watching 137 episodes of TV in under a week just isn’t doable, here’s a quick cheat sheet of the Justice League, Justice League Unlimited, and Young Justice episodes you should watch before they disappear from Netflix on August 1.

Justice League

Years: 2001-2004

Episodes: 52

After the solo Batman and Superman animated series, Warner Bros. brought the League together for their own animated series. The show’s core cast consisted of Batman, Superman, Wonder Woman, the Flash, Green Lantern, Martian Manhunter, and Hawkgirl. The series put the newly formed team up against the heaviest-hitters in the DCU in epic battles unlike anything seen on the ’90s cartoons. Each episode is also a two-parter, meaning that Justice League unfolds like an animated hourlong drama at times.

IMDb’s Top-Rated Episodes: “Legends,” “A Better World,” “Hereafter,” “Wild Card,” “Starcrossed”

Justice League Unlimited

Years: 2004-2006

Episodes: 39

Justice League didn’t end so much as evolve and expand into a new series, Justice League Unlimited. Whereas the previous animated series focused primarily on the core group of Justice Leaguers, Unlimited saw the League’s ranks expand to include dozens of other, sometimes lesser-known DC heroes. In addition to the A-listers, Unlimited also gave screentime to Green Arrow, Supergirl, Captain Atom, the Question, Vixen, Huntress, Black Canary, and others. The show switched from its two-parter format and instead gave viewers half hour adventures.

IMDb’s Top-Rated Episodes: “Question Authority,” “Panic in the Sky,” “Divided We Fall,” “Epilogue,” “Alive!”/“Destroyer”

Young Justice

Years: 2010-2013

Episodes: 46

Young Justice may be set in a different continuity from Justice League and Unlimited (you can tell by the different animation style), but that didn’t make fans love it any less. This series starring a team consisting of teen sidekicks (Miss Martian, Nightwing, Superboy, Aqualad, Artemis, Kid Flash) drew a devoted fanbase and rewarded their attention with two seasons of heavily serialized and action-packed storytelling. Young Justice is even a Netflix success story; the series was renewed for a third season after the show became a streaming sensation years after its cancellation. Even though Netflix availability brought the show back to life, it’ll be one of the flagship shows of the upcoming DC streaming service.

IMDb’s Top-Rated Episodes: “Failsafe,” “Auld Acquaintance,” “Bloodlines,” “Depths,” “Summit”

Where to stream Justice League

Where to stream Justice League Unlimited

Where to stream Young Justice