Richard Paul Fink
— Edward Teller
Gerald Finley
— J. Robert Oppenheimer
Sasha Cooke
— Kitty Oppenheimer
Thomas Glenn
— Robert Wilson
Eric Owens
— General Leslie Groves
Meredith Arwady
— Pasqualita
Earle Patriarco
— Frank Hubbard
Roger Honeywell
— Captain James Nolan
Susan Graham
— Self - Host
Alan Gilbert
— Self - Conductor