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
Tris 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)