O Fim ou o Princípio

At the time of this production, there was a legal requirement that permission had to be obtained from well-known living public figures to be depicted on film. Several prominent scientists refused permission, including Niels Bohr, Sir James Chadwick and Lise Meitner. This unfortunately gave the film the appearance the Manhattan Project was more all-American than it really was.

In the movie the character Matt Cochran (played by Tom Drake) has an accident in the laboratory on Tinian that eventually kills him from radiation poison, but he is credited with saving 40,000 lives because of his self-sacrifice of bare-handedly separating the radioactive materials. This incident did not happen on Tinian. Rather, it reflects a similar accident that killed Canadian scientist Louis Slotin at Los Alamos NM in May 1946.

The opening credits, in light of a print of the film being locked in a time capsule to be opened in 2446, include the following: "You are about to see the motion picture sealed in the time capsule for the people of the 25TH Century." Subsequently, the end credits include the following in light of the opening statement: "To the people of the 25TH Century, This was THE BEGINNING. Only you, and those who have lived between us and you, can know THE END"

Featured in Hiroshima: Why the Bomb Was Dropped (1995)