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 Floriana Lima Maggie Guest Star Carl Lumbly M'yrnn J'onzz Guest Star Helen Slater Eliza Danvers Guest Star Sharon Leal M'gann M'orzz Guest Star Carlos Bernard Oscar Rodas Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Dermott Downs Director Jessica Queller Writer Derek Simon Writer