First air date:
Last air date: 01/25/2011
Number of episodes: 27
Number of seasons: 4
Genres:
Documentary
Countries:
Rating:
7.3
Mysterious events, compelling figures and great unanswered questions from the past are explored, with a focus on the reclusive billionaire Howard Hughes; the CIA's top-secret experiments; the Unabomber and; little known stories from NASA's Apollo missions.
Season 1