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 Floriana Lima Maggie Sawyer Actor Frederick Schmidt John Corben, Metallo Guest Star Brenda Strong Lillian Luthor Guest Star Katie McGrath Lena Luthor Guest Star Peter Gadiot Mr. Mxyzptlk Guest Star Andrea Brooks Eve Teschmacher Guest Star Ian Gomez Snapper Carr Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Tawnia McKiernan Director Robert Rovner Writer Cindy Lichtman Writer