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