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4:00 AM: Secrets Of The Underground (S1 E6) (S1) | Discovery Science | 7/5 2025 Discovery Science
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Secrets Of The Underground « at 4:00 AM on Discovery Science

Episode 6

Broadcast info
Published: 2017
Episode: California's Hidden Doomsday

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

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Richard Hammond's Big (S1 E8)
12:00 PM

Richard Hammond's B ...

Richard Hammond's Big (S1 E8)
1:00 PM

Secrets Of The Underground (S1 E8)

Secrets Of The Underground (S1 E8)
2:00 PM

Secrets Of The Underground (S2 E1)

Secrets Of The Underground (S2 E1)
3:00 PM

How the Universe Works (S6 E3)

How the Universe Works (S6 E3)
4:00 PM

How the Universe Works (S6 E4)

How the Universe Works (S6 E4)
5:00 PM

How the Universe Works (S6 E5)

How the Universe Works (S6 E5)
6:00 PM

How It's Made (S19 E8)

How It's Made (S19 E8)
6:30 PM

How It's Made (S19 E9)

How It's Made (S19 E9)
7:00 PM

How It's Made (S19 E10)

How It's Made (S19 E10)
7:30 PM

How It's Made (S19 E11)

How It's Made (S19 E11)
8:00 PM

How It's Made (S19 E12)

How It's Made (S19 E12)
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How It's Made (S19 E13)

How It's Made (S19 E13)
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How the Universe Works (S7 E3)

How the Universe Works (S7 E3)
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How the Universe Works (S7 E4)

How the Universe Works (S7 E4)
11:00 PM

NASA's Unexplained Files (S4 E3)

NASA's Unexplained Files (S4 E3)
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NASA's Unexplained Files (S4 E4)

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How the Universe Works (S6 E3)

How the Universe Works (S6 E3)
2:00 AM

How the Universe Works (S6 E4)

How the Universe Works (S6 E4)
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Richard Hammond's Big (S1 E7)

Richard Hammond's Big (S1 E7)
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Blowing Up History (S4 E21)

Blowing Up History (S4 E21)

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