- as Barry Allen / Flash
- as Wally West
- as Dr. Harrison Wells
- as Iris West
- as Joe West / Joseph West
- as Ronnie Raymond / Deathstorm
- as Dr. Caitlin Snow
- as Jay Garrick
- as Henry Hewitt
- as Jesse Wells
- as Cisco Ramon
- as Nora Allen (Voice)
- as Floyd Lawton
- as Captain David Singh / David Singh
- as Thug #2
- as Thug #1
- as Reporter
- as Supergirl (Archive footage)
- as The Flash (Archive footage)
- as Zoom (Voice)
The information provided is incomplete. You can help OMDB by expanding it.
Watch "The Flash > Welcome to Earth-2":