Secrets Underground

8:00 PM to 9:00 PM

Saturday 14 February

California's Hidden Doomsday

Season 1 Episode 6 of 8

Rob Nelson heads to California to investigate a network for major fault lines that could set off a mega-quake. Plus, he explores a mysterious sinkhole

Secrets Underground airs on Discovery Channel at 8:00 PM, Saturday 14 February. (Subtitles.)

Topics