Colin was Earth's top test pilot, checking out special purpose ships, until the day it appeared that he and his partner had turned in a false report. Unable to find work again on Earth, he ends up testing ships for an alien race.; When a man needs a costume for a masquerade party but all the shops are closed, he finds a lion skin in an antique shop to use as a Hercules costume. But what he doesn't know is that the lion skin really did belong to Hercules, and that it grants the demi-god's strength to whoever wears it.; After two anthropologists bring an Amazonian caveman back to the states, he begins to progress at a rapid rate until his intelligence and appearance jump beyond where modern-day man is on the evolutionary path.