Melissa Benoist Kara Danvers, Supergirl Actor Calista Flockhart Cat Grant Actor Chyler Leigh Alex Danvers Actor Mehcad Brooks James Olsen Actor David Harewood Hank Henshaw Actor Jeremy Jordan Winslow "Winn" Schott Actor Peter Facinelli Maxwell Lord Guest Star Laura Benanti Alura Zor-El , Astra Guest Star Chris Vance Non Guest Star Robert Gant Zor-El Guest Star Briana Venskus Agent Vasquez Guest Star Christopher Showerman Tor Guest Star Daniel DiMaggio Kal-El Guest Star Sarah Robson DEO Doctor Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer, Writer Sarah Schechter Executive Producer Ted Sullivan Writer Derek Simon Writer Dermott Downs Director