Marcial Echenique, a Cambridge professor, recently became curious when he found wiring concealed under the floorboards of his country mansion, Farm Hall. In April 1945, Farm Hall housed 10 of Germany’s top nuclear physicists captured in daring raids. They were flown to England covertly in a mission code-named Operation Big. Every word they uttered was bugged by MI6. After the dropping of the atom bombs on Japan, these men would claim they could have developed A-bombs for the Third Reich, but did not "for the greater good of mankind." Most believe this to have been a lie. But was there an even greater deception? Were they captured not to stop Hitler, but to stop Stalin? Did the U.S. drop the Bomb as a show of power not to the Japanese, but to the Soviets? Colin Brown guides us through a world of espionage, scientific discovery and questions of morality as he reveals the extraordinary truth surrounding Hitler’s atomic bomb.