Melissa Benoist Kara Danvers, Supergirl Actor Chyler Leigh Alex Danvers Actor Mehcad Brooks James Olsen Actor David Harewood Hank Henshaw Actor Jeremy Jordan Winslow "Winn" Schott Actor Chris Wood Mon-El Actor Katie McGrath Lena Luthor Actor Odette Annable Samantha Arias Actor Helen Slater Eliza Danvers Actor Izabela Vidovic Young Kara Guest Star Olivia Nikkanen Young Alex Guest Star Erica Durance Noel Neill Actor Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Rob J. Greenlea Director Caitlin Parrish Writer Jess Kardos Writer