Stuart Whitman
Dr. McCarter Purvis
Acting
Sandy Dennis
Dr. Enid Bingham
Acting
Burl Ives
T.M. Trask
Acting
Tom Harvey
McBride
Acting
Robert Goodier
Dr. Wilfrid Morton
Acting
Ron Hartmann
Dr. John Emmett
Acting
Jack Creley
Dr. George Simmons
Acting
Allen Doremus
Dr. Carl Bryant
Acting
Kenneth James
Clinton
Acting
Joseph Shaw
Dr. Franz Heinemann
Acting
Clem Hambourg
Pianist
Acting
Harvey Fisher
Copter Pilot
Acting
Robert Warner
Guard #1
Acting
John S. Davies
Doctor
Acting
V.K. Saini
V.K. Saini
Acting
George Pyfrom
Surgeon #2
Acting
Claudia Koropecki
Surgeon #3
Acting
Nina Keogh
Trask's Nurse (uncredited)
Acting
Robert Mann
Guard #3
Writing
James Forrest
Guard #4
Acting