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 Carl Lumbly M'yrnn J'onzz Guest Star Chad Lowe Thomas Coville Guest Star 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 Dermott Downs Director Gabriel Llanas Writer Anna Musky-Goldwyn Writer