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, Reign Actor Erica Durance Alura Zor-El Guest Star Emma Tremblay Ruby Arias Guest Star Anjali Jay Selena Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Hanelle M. Culpepper Director Derek Simon Writer Katie Rose Rogers Writer