4:00 AM: Secrets Of The Underground (S1 E1) (S1) | Discovery Science | 7/3 2025

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Secrets Of The Underground « at 4:00 AM on Discovery Science

Episode 1

Broadcast info
Published:	2017
Episode:	American Stonehenge

Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.

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Secrets Of The Underground (S1 E8)

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Secrets Of The Underground (S2 E1)

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How the Universe Works (S6 E3)

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How the Universe Works (S6 E4)

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How the Universe Works (S6 E5)

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How It's Made (S19 E8)

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How It's Made (S19 E9)

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How It's Made (S19 E10)

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How It's Made (S19 E11)

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How It's Made (S19 E12)

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How the Universe Works (S7 E3)

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NASA's Unexplained Files (S4 E3)

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NASA's Unexplained Files (S4 E4)

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Secrets Of The Underground « at 4:00 AM on Discovery Science

Episode 1

Richard Hammond's B ...

Secrets Of The Underground (S1 E8)

Secrets Of The Underground (S2 E1)

How the Universe Works (S6 E3)

How the Universe Works (S6 E4)

How the Universe Works (S6 E5)

How It's Made (S19 E8)

How It's Made (S19 E9)

How It's Made (S19 E10)

How It's Made (S19 E11)

How It's Made (S19 E12)

How It's Made (S19 E13)

How the Universe Works (S7 E3)

How the Universe Works (S7 E4)

NASA's Unexplained Files (S4 E3)

NASA's Unexplained Files (S4 E4)

How the Universe Works (S6 E3)

How the Universe Works (S6 E4)

Richard Hammond's Big (S1 E7)

Blowing Up History (S4 E21)

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Denmark

Copenhagen

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USA

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