Fritz Haber

 was known to the First Doctor as one of the notable scientists in 1933 Germany. That year, he and Susan Foreman became entangled in a plot to kidnap Haber and have him extract gold from sea water. While German underground crime syndicates sought the secret to aid in the nation's economic recovery, Pollitt, a member of the British Secret Intelligence Service sought the secret as well. Susan wrecked Pollitt's chances of discovering the secret and potentially changing the history of the coming war. With history back on track, the Doctor and Susan later lamented that, if Germany had been in a better economic position, Hitler may not have come to power. (AUDIO: The Alchemists)