When the fugitives found the ruins of Oakland, they also found (in the "Oakland Science Center") an ancient recording made by the scientific elite of a dying human civilisation. The Scientist's holographic message gave hope to the astronauts that they might yet find the technology that would bring them back to their own time. He was one of a group of surviving humans who had placed the sum of their knowledge in certain repositories of equipment hidden around the country for the future use of a revived human race.