as I. Robert Oppenheimer
as Ward V. Evans
as Thomas A. Morgan
as Roger Robb
as Gordon Gray
as Herbert S. Marks
as Loyd K. Garrison
as Borris T. Pash
as John Lansdale
as Edward Teller
as Hans Bethe
as David Tressel Griggs
as Isadore Isaac Rabi
as Berichterstatter
