Supergirl Bumps Lena Luthor Actress to Series Regular: What Does It Mean?

Supergirl will take down Project Cadmus by the end of the season -- but Lena Luthor (Katie McGrath) will be sticking around.

McGrath has been promoted to series regular for the show's third season, according to Deadline, which means that no matter what happens with Lena's mother -- who is running

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