Kenneth Tobey
Captain Patrick Hendry
Acting
Margaret Sheridan
Nikki
Acting
Robert Cornthwaite
Dr. Arthur Carrington
Acting
Douglas Spencer
Ned 'Scotty' Scott
Acting
James Young
Lt. Eddie Dykes
Acting
Dewey Martin
Crew Chief Bob
Acting
Robert Nichols
Lt. Ken 'Mac' Erickson
Acting
William Self
Corporal Barnes
Acting
Nicholas Byron
Tex Richards
Acting
Eduard Franz
Dr. Stern
Acting
George Fenneman
Dr. Redding
Acting
Paul Frees
Prof. Voorhees
Acting
Everett Glass
Prof. Wilson
Acting
Norbert Schiller
Dr. Lorenz
Acting
Edmund Breon
Prof. Ambrose
Acting
John Dierkes
Dr. Chapman
Acting
Sally Creighton
Mrs. Chapman
Acting
James Arness
'The Thing'
Acting
David McMahon
Gen. Fogarty
Acting
Bill Neff
Bill Stone (uncredited)
Acting