Secrets Underground

9:00 AM to 10:00 AM

Saturday 5 September

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 Science at 9:00 AM, Saturday 5 September. (Subtitles.)

Topics