Creature with the Atom Brain

Richard Denning

— Dr. Chet Walker

S. John Launer

— Capt. Dave Harris

Michael Granger

— Frank Buchanan

Gregory Gaye

— Dr. Wilhelm Steigg

Angela Stevens

— Joyce Walker

Linda Bennett

— Penny Walker

Charles Evans

— Chief Camden

Tristram Coffin

— Dist. Atty. MacGraw

Pierre Watkin

— Mayor Bremer

Harry Lauter

— Reporter #1

Larry J. Blake

— Reporter #2

Paul Hoffman

— Tom Dunn (uncredited)

Nelson Leigh

— Dr. Kenneth C. Norton (uncredited)

Edward Coch

— Jason Franchot (uncredited)

Lane Chandler

— Gen. Saunders (uncredited)

Don C. Harvey

— Lester Banning (uncredited)

Richard H. Cutting

— Dick Cutting, Radio Broadcaster (uncredited)

Paul Bradley

— Gambling Casino Employee (uncredited)

Karl 'Killer' Davis

— Willard Pearce (uncredited)

Terry Frost

— Tom, Policeman (uncredited)

Cap Somers

— Policeman (uncredited)

Tyler McVey

— Police Officer (uncredited)

Eddie Foster

— Bartender (uncredited)

Bill Clark

— Policeman (uncredited)

Chuck Hicks

— Pilot (uncredited)

Dick Crockett

— Creature Who Calls Camden (uncredited)

George Bruggeman

— Creature (uncredited)

Charles Horvath

— Creature (uncredited)

Boyd 'Red' Morgan

— Creature (uncredited)

Michael Ross

— Creature Vernon Dunn (uncredited)