In the Supergirl episode “Red Faced,” while Kara (Melissa Benoist) must fight Red Tornado, a military cyborg that’s gone rogue, “The Queen of All Media” Cat Grant (Calista Flockhart) is shaken by a visit from her super judgmental mother, Katherine. She’s in town for a book tour (she’s an editor of books) but doesn’t have time to visit her grandson Carter.
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Katherine Grant is portrayed by Joan Juliet Buck. She’s best known for her roles in the films Julie & Julia (Madame Brassart) and Learning to Drive
