Reparto
Ronald Baddiley
Narrator
Robert Beatty
Narrator
J. Robert Oppenheimer
self (archive footage)
Edward Teller
self (archive footage)
George Gamow
self (archive footage)
Enrico Fermi
self (archive footage)
Hans Bethe
self (archive footage)
King Gustaf V
self (archive footage)
George Thomson
self (archive footage)
C. E. M. Joad
self (archive footage)
Winston Churchill
self (archive footage)
Harry S. Truman
self (archive footage)
