0 05:22 STARTLING EXPERIMENT Proves Alien Civilization | The Secret of Skinwalker Ranch (S2) | History
0 09:29 New Evidence Found in the Mystery of the Mayan Civilization: Cities of the Underworld (S1) | History
0 42:04 UFOs Lurk Over US Cities | Unidentified: Inside America's UFO Investigation (S1, E4) | Full Episode
0 41:36 UFOs Linked to Atomic Bomb | Unidentified: Inside America's UFO Investigation (S1 E5) | Full Episode
5 41:45 The Pentagon's UFO Secret | Unidentified: Inside America's UFO Investigation (S2, E8) | Full Episode
0 41:17 UFOs Exposed by U.S. Navy | Unidentified: Inside America's UFO Investigation (S2, E1) | Full Episode