The Nuclear Man

Clancy Brown

General Wade Eiling

Isabella Hofmann

Clarissa Stein

Bill Dow

Quentin Quale

Chase Masterson

Sherry

Paul Griggs

Jumper

Herbert Duncanson

Sergeant Bates

Logan Williams

Young Barry Allen

Robbie Amell

Ronnie Raymond / Firestorm

Melise

Linda Park

Victor Garber

Dr. Martin Stein

Michelle Harrison

Nora Allen

Morena Baccarin

Gideon (voice) (uncredited)