Melissa Benoist Kara Danvers, Supergirl Actor Calista Flockhart Cat Grant Actor Chyler Leigh Alex Danvers Actor Mehcad Brooks James Olsen Actor David Harewood Hank Henshaw Actor Jeremy Jordan Winslow "Winn" Schott Actor Jenna Dewan Lucy Lane Guest Star Malina Pauli Weissman Young Kara Zor-El Guest Star Helen Slater Eliza Danvers Guest Star Dean Cain Dr. Jeremiah Danvers Guest Star Jordan Mazarati Young Alex Danvers Guest Star Jay Jackson Male Newscaster Guest Star Brit Morgan Leslie Willis , Livewire Guest Star Michael Mealor Fratty Dude Guest Star Tom Waite Pilot Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Roberto Aguirre-Sacasa Writer Caitlin Parrish Writer Kevin Tancharoen Director