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 Jenna Dewan Lucy Lane Guest Star Briana Venskus Agent Vasquez Guest Star Iddo Goldberg Red Tornado , T. O. Morrow Guest Star Glenn Morshower General Sam Lane Guest Star Luke Macfarlane Agent Donovan Guest Star Joan Juliet Buck Katherine Grant Guest Star Greg Berlanti Executive Producer Allison Adler Executive Producer Andrew Kreisberg Executive Producer Sarah Schechter Executive Producer Michael Grassi Writer Rachel Shukert Writer Jesse Warn Director