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 Cara Buono Gamenmae Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Jesse Warn Director Robert Rovner Writer Jessica Queller Writer Jay Faerber Writer Jess Kardos Writer