The Walking Dead just revealed how its zombie apocalypse might end in a shocking glimpse at the outbreak's future. Tales of the Walking Dead hasn't exactly taken full advantage of its timeline freedom thus far, but while the spinoff's previous three entries have all taken place before The Walking Dead season 11's era, episode 4 jumps further ahead than The Walking Dead has ever gone before. Starring Anthony Edwards as Dr. Everett and Poppy Liu as Amy, the story begins with a faux nature documentary on the "homo mortus" (zombie to you and I) narrated by Everett.

The Walking Dead has teased several potential endings to the zombie apocalypse. Robert Kirkman's original comics show Rick Grimes' safe zone expanding so vastly, most folks within have never even seen a walker. In Walking Dead: World Beyond, the Bennett family and their friends are working on a fungi-based weapon for wiping out the undead population, while the Civic Republic purports to have its own (secret) ideas on how to restore civilization. Tales of the Walking Dead episode 4 paints a very different kind of picture for how the zombie apocalypse ends - the Dead Sector.

Related: The Walking Dead Retcons Alpha’s Whisperer Origin

Dr. Everett describes an area spanning "hundreds of miles" isolated by a 200-meter-wide, 40-foot-deep trench where much of the country's zombie population has apparently been contained. The narration implies that sometime in the apocalypse's future, an organized group (potentially the CRM?) dug this massive canyon and herded as many zombies as possible (undead numbers would've dwindled naturally by this point) onto the makeshift island. Predictably, however, humans remain their own worst enemies. Dr. Everett reveals survivors are deliberately crossing the trench to collect zombie skulls, which are used as "scare propaganda." Sneaking into the Dead Sector to poach a zombified noggin proves just how rare undead must be beyond the trench, but it's not all good news. Amy ominously asks Everett, "You ever see how bad it is on the other side?" Her people are attempting to resettle the Dead Sector, so solving the zombie problem doesn't automatically mean The Walking Dead's apocalypse is over.

Tales Ep. 4 Sets Up The Walking Dead Season 11's Smart Zombies

Zombies in Tales of the Walking Dead

AMC's main The Walking Dead TV show hasn't set up the zombie apocalypse's conclusion just yet, but season 11 is teasing the outbreak's next evolution. Walking Dead: World Beyond season 2's finale introduced a smarter, faster brand of undead in France, not only capable of jogging but also aware of its surroundings - doors, walls, handles etc. These zombies were first shown (probably without any grand design) in The Walking Dead season 1 before quickly being phased out, but trailer footage for season 11's final third has promised a full exposé on smart walkers. Tales of the Walking Dead episode 4 adds another piece to the puzzle, as Dr. Everett's documentary describes seeing Specimen 21 kill a wild dog then leave its corpse for the herd behind him, implying intelligent behavior.

Smart zombies look destined to play a major part in The Walking Dead's future and the franchise's eventual ending, but that doesn't necessarily mean Tales of the Walking Dead's Dead Sector will play any role whatsoever in the main series or its upcoming spinoffs. Tales of the Walking Dead has a very loose relationship to existing canon, with episode 2 delving into time travel and episode 3 giving a completely revised origin story for Alpha and the Whisperers. Tales of the Walking Dead may reveal a future where zombies are trapped inside a single massive area by a humongous trench... but don't expect The Walking Dead to necessarily honor that outcome if the main timeline ever reaches this far ahead.

Tales of the Walking Dead continues Sunday on AMC.