It makes sense, then, that Supergirl will take part in an Arrowverse crossover that features an alien race known as the Dominators.
Despite their comic book connections, Supergirl exists on a very different Earth than the other three CW shows.
Supergirl premieres for the first time on The CW next week, after her debut season aired on CBS.
Supergirl even gets the honor of kicking off the schedule each week on Monday, followed by The Flash, Arrow, and Legends of Tomorrow on successive nights.