- as James Olsen / Guardian
- as Supergirl
- as Alex Danvers
- as Winn Schott
- as Mon-El
- as J'onn J'onzz
- as Oliver Queen / Green Arrow / Black Arrow
- as Dr. Martin Stein
- as Joe West
- as Felicity Smoak
- as Sara Lance
- as Dr. Harry Wells / Eobard Thawne / Reverse-Flash
- as Mick Rory
- as Iris West
- as Jefferson Jackson / Firestorm
- as Caitlin Snow / Killer Frost
- as Cisco Ramon / Vibe
- as Wally West / Kid Flash
- as Barry Allen / The Flash
- as Nora West-Allen
- as Cecile Horton
- as Captain David Singh
- as Lily Stein
- as Clarissa Stein
- as Minister
- as Greggor
- as Rob
Watch "Supergirl > Crisis on Earth-X":