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The Best Episodes of Secrets of the Underground Season 1

Every episode of Secrets of the Underground Season 1 ranked from best to worst. Discover the Best Episodes of Secrets of the Underground Season 1!

Binge this in 8h 0m•Peaking at 7.9/10

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.

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Episode Rankings

  1. #1 Fan Favorite
    Secrets of the Underground Season 1 Episode 1 - Capone's Escape Tunnels
    7.4/10(16 votes)

    #1 - Capone's Escape Tunnels

    S1:E1

    Rob Nelson investigates rumors of a secret underground escape route used by the infamous gangster Al Capone. In Washington state, Rob tries to uncover who -- or what -- built a vast landscape of earthen mounds in Washington state.

    Director:Unknown
    Writer:Unknown

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  2. Secrets of the Underground Season 1 Episode 2 - Mystery of the Serpent Mound
    7.5/10(19 votes)

    #2 - Mystery of the Serpent Mound

    S1:E2

    Rob Nelson explores mysterious tunnels beneath Denver's airport and capitol building to investigate rumors of a secret organization operating below. In Ohio, he tries to uncover the ancient secrets of a mound shaped like a serpent.

    Director:Unknown
    Writer:Unknown

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  3. Secrets of the Underground Season 1 Episode 3 - America's Buried Massacre
    7.8/10(20 votes)

    #3 - America's Buried Massacre

    S1:E3

    Rob Nelson hunts for a legendary mass grave that could expose a dark secret of America's industrial past. High in the mountains, a giant lake is mysteriously disappearing, and Rob uses cutting-edge technology to find out why.

    Director:Unknown
    Writer:Unknown

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  4. Secrets of the Underground Season 1 Episode 4 - Rocky Mountain Monsters
    7.5/10(17 votes)

    #4 - Rocky Mountain Monsters

    S1:E4

    Rob Nelson examines a set of bizarre markings that suggest a violent clash between prehistoric beasts. In California, he investigates if a strange lake is a home to alien life.

    Director:Unknown
    Writer:Unknown

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  5. Secrets of the Underground Season 1 Episode 5 - Great Lakes Bermuda Triangle
    7.9/10(16 votes)

    #5 - Great Lakes Bermuda Triangle

    S1:E5

    Rob descends into a cave 30 feet beneath Texas in search of evidence of a mass extinction event. Then, he heads to Lake Michigan to investigate a Bermuda Triangle-like phenomenon that has caused ships to vanish for centuries.

    Director:Unknown
    Writer:Unknown

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  6. Secrets of the Underground Season 1 Episode 6 - California's Hidden Doomsday
    6.8/10(14 votes)

    #6 - California's Hidden Doomsday

    S1:E6

    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.

    Director:Unknown
    Writer:Unknown

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  7. Secrets of the Underground Season 1 Episode 7 - Secret History of the New World
    7.5/10(13 votes)

    #7 - Secret History of the New World

    S1:E7

    Rob investigates ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus. Then, he heads to California where a dormant super-volcano may be showing new signs of life.

    Director:Unknown
    Writer:Unknown

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  8. Secrets of the Underground Season 1 Episode 8 - American Stonehenge
    7.2/10(14 votes)

    #8 - American Stonehenge

    S1:E8

    Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge. At the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.

    Director:Unknown
    Writer:Unknown

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Season 1 Ratings Summary

"Capone's Escape Tunnels" is the best rated episode of "Secrets of the Underground" season 1. It scored 7.4/10 based on 16 votes. Directed by Unknown and written by Unknown, it aired on 2/14/2017. This episode is rated 0.1 points higher than the second-best, "Mystery of the Serpent Mound".