"Kara Danvers was a mistake."

Those words were the biggest surprise of the Supergirlpanel at Comic-Con Saturday022 Archives as the showrunners teased a Season 3 that looks certain to get as dark for the girl of steel as Season 3 of the TheFlashdid for that hero.

"The theme of Season 3 is 'what does it mean to be human?'", said new showrunner Jessica Queller. "All of the characters will be exploring that question, especially Kara."

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The Supergirlpanel also confirmed that Calista Flockhart's Cat Grant will return as a regular character, and that Heroesstar Adrian Pasdar will play a highly topical real estate tycoon villain.

Supergirlreturns to the CW October 9.

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