Melissa Benoist Kara Danvers, Supergirl Actor Chyler Leigh Alex Danvers Actor Mehcad Brooks James Olsen Actor David Harewood Hank Henshaw, J'onn J'onzz Actor Katie McGrath Lena Luthor Actor Nicole Maines Nia Nal, Dreamer Actor Jesse Rath Querl "Brainy" Dox, Brainiac 5 Actor April Parker Jones Colonel Lauren Haley Actor Sam Witwer Agent Liberty Actor Julie Gonzalo Andrea Rojas Actor Azie Tesfai Kelly Olsen Actor Staz Nair William Dey Actor Aiden Stoxx Joey Guest Star Jhaleil Swaby Orlando Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Shannon Kohli Director Emilio Ortega Aldrich Writer Karen Maser Writer