Secrets of the Underground - Season 1 - Eps 6: California's Hidden Doomsday
Rob Nelson heads to California to investigate a network for major fault lines that could set off an unprecedented mega-quake. Then, he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.
About Secrets of the Underground
Title: Secrets of the Underground
First Air Date: 2017-02-14
Last Air Date: 2017-12-16
Status: Returning Series
Rating: 4.3/10 (from 3 votes)
Language: EN
Seasons: 2
Total Episodes: 16
Network: Science
Genres: Reality, Documentary
Production Companies: Science Channel
Synopsis
A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.
