Thanks to a cameo appearance from Henry in episode 7, the learns that the spinoff's main villains, the Akrida, originate from a parallel universe, and possess the ability to invade other worlds. Sam and Dean only began dipping their toes this deep into the multiverse later in their
Back in , Ada Monroe hinted that the Akrida are interdimensional in nature, but her phrasing was drenched in ambiguity.
Intriguingly, episode 7 not only supports the theory that take place in different universes, it paves the way for a crossover. The monster-killing box the Scooby gang discovered in episode 1 is named as the Ostium, and rather than killing monsters, it actually opens a portal between dimensions and transports them.
Henry Winchester implies that the material used to power the Ostium dictates which universe it opens a doorway into. If ' young John and Mary get their hands on an item from 's universe, therefore, the Ostium could create a bridge between each show.
That scenario, if it actually comes to pass, would offer the best of both worlds. On one hand, the can continue playing canon contortionist as it sees fit; on the other, the potential to interact with storylines and characters from main continuity is available. One might even suggest that the very fact introduced a gateway to the multiverse in its very first episode proves the spinoff is happening in a reality quite apart from .