The Princess of Samarkand and an English knight confront the armies of Genghis Khan.

College prof Peter Boyd tries to salvage his professional and personal reputation by using a lab chimp to prove that environment trumps heredity in behavioral development.

Five astronauts successfully fly to Mars where they encounter seemingly friendly and advanced inhabitants who harbor covert plans to use their ship to invade Earth.

U.S. Treasury Department agents go after a ring of counterfeiters.