Grant
Stephen Boyd
Cora
Raquel Welch
Nurse
Shelby Grant
Technician
James Brolin
Wireless Operator
Brendan Fitzgerald
Military Policeman (uncredited)
Brendon Boone
Dr. Sawyer (Hypothermia technician) (uncredited)
James Doohan
Henry - Heart Monitoring (uncredited)
Kenneth MacDonald
Young Scientist (uncredited)
Christopher Riordan
General Carter
Edmond O'Brien
Dr. Michaels
Donald Pleasence
Col. Donald Reid
Arthur O'Connell
Capt. Bill Owens
William Redfield
Dr. Duval
Arthur Kennedy
Jan Benes
Jean Del Val
Communications Aide
Barry Coe
Secret Service
Ken Scott
Director
Richard Fleischer
Researcher
Harper Goff
Producer
Saul David
Original Music Composer
Leonard Rosenman
Art Direction
Dale Hennesy
Makeup Artist
Ben Nye
Story
Jerome Bixby
Director of Photography
Ernest Laszlo
Editor
William B. Murphy
Jack Martin Smith
Set Decoration
Stuart A. Reiss
Walter M. Scott
Adaptation
David Duncan
Otto Klement
Screenplay
Harry Kleiner
Hairstylist
Margaret Donovan
Unit Production Manager
Eric Stacey
Sound Effects
Walter Rossi
Assistant Director
Ad Schaumer
Sound
Bernard Freericks
David Dockendorf
Special Effects
L.B. Abbott
Art Cruickshank
Emil Kosa Jr.
Technical Advisor
Fred Zendar
Aerial Coordinator
Peter Foy
Title Designer
Richard Kuhn