Just like many of the biggest franchises currently running, Supernatural created a multiverse, but unlike the cinematic universes, most of these other worlds were explored within the main show. Considering the show's extraordinary run from 2005 to 2020, there was a lot of time to fill with stories across 327 episodes of Supernatural. While the show started with humble horror beginnings that saw it lean heavily into supernatural horror stories with demons and terrifying monsters, it quickly evolved into an emotional and dramatic fantasy series that revolved around two brothers.

Sam and Dean Winchester made Supernatural what it is, from the minute the duo appear on-screen together up to the emotional finale of season 15. But, over time, the brothers are faced with increasingly challenging enemies, including the aforementioned demons, then angels, then supernatural beings who are as old as time, and eventually, even god himself. And the action did not stop at the edge of their own reality either. In later seasons, beginning with season 6, the show began to introduce and mention the multiverse, with other worlds running parallel to their own.

17 Alternate Earth

The first mention of another reality in Supernatural came in season 6, episode 15, "The French Mistake." This introduction to the multiverse was perfect for Supernatural, as it used the meta humor that the show famously does extremely well to put Sam and Dean into the roles of Jared and Jensen. This world is mostly similar to Sam and Dean's, with one major exception being the fact that magic and supernatural beings do not exist here. It's clearly implied that Sam and Dean broke into the real world occupied by the audience, as they step into the lives of the actors playing Sam and Dean on the show..

16 Apocalypse World

Apocalypse World more closely resembles the world occupied by Sam and Dean, and indeed both had the same history up until 1973. At that point, John Wicnchester was killed by Azazel, and Mary Campbell was made an offer to save his life, but she refused. As a result, neither Sam or Dean are born, and when the apocalypse arrives with the Archangel Michael leading the charge, the world falls swiftly. This world is a battleground, with many cities completely destroyed, and an alternate version of Michael ruling over the world with an iron fist.

15 The Bad Place

Within Supernatural, on one of the occasions when Dean dies, he arrives in a large forest, full of monsters and deadly creatures. This was revealed to be Purgatory, and the alternate world, known as 'The Bad Place,' very much resembles this world, aside from the fact that there is a day and night cycle, while Purgatory is constantly in darkness. The Bad Place is only briefly seen in season 13, when Kaia Nieves is introduced. Kaia is a dreamwalker, capable of traveling through worlds, and she finds herself stuck in The Bad Place for two years, running from monsters to try and stay alive.

14 Yokoth & Glythur's World

Supernatural season 13 did a lot of the heavy lifting when it comes to introducing alternate worlds, as multiple episodes revolve around these mysterious places. In season 13, episode 17, "The Thing," another is revealed when Sam and Dean accidentally release an ancient and ravenous god known as Yokoth. Yokoth was a being who previously resided in a world where she and her partner, Glythur, had destroyed galaxies and consumed all of their reality. One of the Men of Letters on Sam and Dean's world opened a rift to bring these destroyers over and cleanse the Earth, but they were ultimately separated and Yokoth trapped until decades later.

13 Earth 2

In Supernatural season 15, episode 12, "Galaxy Brain," god, aka Chuck, is seen residing on Earth 2. This world is very similar to Sam and Dean's own world, but god fled here after escaping from a trap set by Sam and Dean. It is here that god chooses to set up camp in a Radio Shed, watching numerous TV screens and destroying every reality one by one. It takes time, so he spends weeks watching each reality meet its end on the monitors before ultimately destroying Earth 2 and making his way back to confront Sam and Dean.

While Chuck managed to destroy all the alternate realities in Supernatural, the spin-off show, The Winchesters, reveals that Jack Kline restored every reality that Chuck destroyed once he ascends to become the new god.

12 HunterCorp World

The Supernatural episode that follows Chuck's destructive streak of wiping out entire worlds, "Destiny's Child," introduced yet another alternate world, but this time, a number of its inhabitants were able to escape their world's explosive destruction. John Winchester from HunterCorp World was a rich businessman who set up a hunting company that became wildly successful. As a result, he spoiled his sons, Sam and Dean, and while they were 'hunters,' they were nowhere near as experienced at actually fighting monsters as their alternate counterparts.

11 Scooby-Doo Universe

Briefly returning to season 13, there was one notable crossover which saw Sam and Dean transported into the world of another popular supernatural mystery show, Scooby-Doo. "Scoobynatural" sees Sam, Dean, and Castiel transported inside a TV, where they the Scooby gang. This world appears to be the same as the one seen in Scooby-Doo, Where Are You!, and so, the Winchesters and Cas are transformed into animated characters. This world is only seen and mentioned on TV, and a ghost child with psychic powers transports them in and out, which could mean that it's not one of the worlds created, or subsequently destroyed, by Chuck.

10 Supernatural: The Anime Series World

In another animated adventure, Sam and Dean Winchester were adapted into an anime series which was originally released in Japan, before being translated and released in the USA. Supernatural: The Anime Series ran for one 22 episode season, with 12 adapted stories, and 10 original adventures. This means, that while there were similarities, this reality clearly diverges from the events of the original, and stands out as another world entirely.

9 Monster Club Universe

While The Winchesters was originally set as a prequel spin-off which would explore the story of John Winchester and Mary Campbell's early romance, the short-lived series quickly forged its own path. In the first and only season released before the show was canceled, the Monster Club Universe, where John, Mary, and their friends are faced with incredible threats, they prove themselves incredibly capable as they fight menacing world-ending monsters. The series does have connections to the original, but this is not the John and Mary Winchester who appear in the original series.

8 The Akrida Universe

The most notable threat that the of the Monster Club face is a monster known as the Akrida. This creature never appeared in Supernatural, and apparently, they were not native to the Monster Club's own universe either. Instead, the universe that the Akrida hail from is left mostly mysterious, but it was clearly a place that these creatures either fled, or left behind. Whether the Akrida destroyed their reality, like Yokoth and Glythur, or they wanted to find somewhere they could reign supreme is unclear, but they arrived in the Monster Club Universe, and fought the Monster Club.