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)