Trailer
Diễn viên
Peter Hansen
Dr. Tony Drake
Stephen Chase
Dr. George Frye
Frank Cady
Harold Ferris
Gertrude Astor
Traveler (uncredited)
Estelle Etterre
Traveler (uncredited)
Paul Frees
Narrator/U.S. President (voice)
John Hoyt
Sydney Stanton
Rachel Ames
Julie Cummings
James Congdon
Eddie Garson (uncredited)
Mary Murphy
Student
Larry Keating
Dr. Cole Hendron
Richard Derr
David Randall
Barbara Rush
Joyce Hendron
Hayden Rorke
Dr. Emery Bronson
Sandro Giglio
Dr. Ottinger
Kirk Alyn
Rioter Bringing Guns (uncredited)