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 Grant Gustin Barry Allen, The Flash Guest Star Jenna Dewan Lucy Lane Guest Star Chris Vance Non Guest Star Italia Ricci Siobhan Smythe, Silver Banshee Guest Star Brit Morgan Leslie Willis, Livewire Guest Star Christopher Showerman Tor Guest Star Jay Jackson News Anchor Guest Star Dan Warner Fire Chief Guest Star Greg Berlanti Executive Producer, Writer Allison Adler Executive Producer Andrew Kreisberg Executive Producer, Writer Sarah Schechter Executive Producer Michael Grassi Writer Nick Gomez Director