Creature with the Atom Brain
Dr. Chet Walker
Capt. Dave Harris
Frank Buchanan
Dr. Wilhelm Steigg
Joyce Walker
Penny Walker
Chief Camden
Dist. Atty. MacGraw
Mayor Bremer
Reporter #1
Reporter #2
Tom Dunn (uncredited)
Dr. Kenneth C. Norton (uncredited)
Jason Franchot (uncredited)
Gen. Saunders (uncredited)
Lester Banning (uncredited)
Dick Cutting, Radio Broadcaster (uncredited)
Gambling Casino Employee (uncredited)
Willard Pearce (uncredited)
Tom, Policeman (uncredited)
Policeman (uncredited)
Police Officer (uncredited)
Bartender (uncredited)
