The World at War Season 1 Episode 24 The Atomic Bomb (February–September 1945) ( Air Date 1974-04-24 ) Genre Documentary, War & Politics category. Overview "Western scientists have developed a new, immensely powerful weapon - the atomic bomb. On August 6th 1945, the Enola Gay delivers the world's first atomic bomb to Hiroshima. The world would be forever altered.".