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