NOVA probes the untold story of the elite corps of clandestine astronauts who were never told the true purpose of their training program.

While NASA astronauts were captivating the world with the Apollo lunar landings, the U.S. was engaged in a top-secret military manned space program. Now, investigative author Jim Bamford (acclaimed author of The Puzzle Palace ) probes the untold story of the elite corps of clandestine astronauts who were never told the true purpose of their training program. Bamford travels to Russia to reveal the secrets of the Soviet response - the prototypes of the "Almaz" military space stations that, if deployed, might have led to a Cold War showdown in outer space.