Cast e produzione
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Lynne AdamsReporter - Kenneth WelshPresident Harry S Truman
- Wesley AddySecretary of War Henry L. Stimson
- Richard MasurGen. Leslie R. Groves
- Sheena LarkinBess Truman
- Leni ParkerMargaret Truman
- Jeffrey DeMunnJ. Robert Oppenheimer
- David GowCol. Paul Tibbets
- Eleanor YeomanEleanor Roosevelt
- David HemblenSteve Early
- George R. RobertsonAdm. William D. Leahy
- Timothy WestPrime Minister Winston Churchill
- Mark CamachoCharles Sweeney, Pilot
- Charles Edwin PowellKermit Beahan
- Tedd DillonJohn Kuharek
- Gary ReinekeCapt. William 'Deke' Parsons
- Ken JenkinsSecretary of State James F. Byrnes
- Saul RubinekLeo Szilard
- Leon PownallGen. George C. Marshall
- James BradfordAdm. Ernest J. King
- Kurt ReisGen. Thomas T. Handy
- Bernard BehrensAsst. Secretary of War John J. McCloy
- Vlasta VranaGen. Tom Farrell
- Ron GabrielPress Secretary
- Len WattJournalist
- John Winston CarrollChief Justice Stone
- Roger DunnReporter
- Frank FontaineReporter
- Alain GoulemRobert Lewis
- Al VandecruysDuty Officer
- Allen AltmanJoseph Stiborik
- Koreyoshi KuraharaRegista
- Roger SpottiswoodeRegista
- Michael CampusProduzione
- Robin SpryProduzione
- Toshirô IshidoSceneggiatura
- John HopkinsSceneggiatura