Browse episode ratings trends for Secrets of the Underground. Simply click on the interactive rating graph to explore the best and worst of Secrets of the Underground's 16 episodes.
Best Episodes of Secrets of the Underground
Doomsday Volcano of the Gods
S2 Ep4
7.7
18th Nov 2017
A massive supervolcano beneath Naples, Italy may be on the verge of erupting again, which could have apocalyptic consequences across the planet. Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.
Mystery of the Ice Cave
S2 Ep6
7.7
2nd Dec 2017
A strange cave freezes in the summer and melts in the winter, and a massive sand dune swallows a small child in an instant. Rob Nelson and Stefan Burns use cutting-edge technology to investigate these mysteries of the natural world.
Legend of the Nazi Gold
S2 Ep1
7.6
28th Oct 2017
A legendary train filled with stolen Nazi gold is said to be hidden in Poland. Using cutting-edge technology, Rob Nelson and Stefan Burns explore deep underneath the earth's surface and in abandoned Nazi tunnels in search for the infamous legend.
Quest for the Gold Rush Fortune
S2 Ep8
7.6
16th Dec 2017
Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California. Rob Nelson and Stefan Burns use cutting-edge technology to search for the legendary treasure.
Atlantis in America
S2 Ep5
7.5
25th Nov 2017
New theories claim that the legendary sunken city of Atlantis could have actually been in the Americas. Rob Nelson & Stefan Burns use cutting-edge technology to investigate evidence that might shed more light on one of the world's greatest mysteries.
Worst Episodes of Secrets of the Underground
Lost Pirate City Treasure
S2 Ep7
7.1
9th Dec 2017
When an infamous pirate city sunk into the sea after a massive earthquake, a pirate's treasure might have disappeared with it. Rob Nelson and Stefan Burns use cutting-edge technology to hunt for the legendary lost pirate treasure of Henry Morgan.
Great Lakes Bermuda Triangle
S1 Ep5
7.2
14th Mar 2017
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.
Rocky Mountain Monsters
S1 Ep4
7.2
7th Mar 2017
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.
King Solomon's Treasures
S2 Ep2
7.2
4th Nov 2017
Priceless gold and silver artifacts are believed to be in fabled lost Temple Treasures of Jerusalem & King Solomon's hidden mines. With unprecedented access, Rob Nelson and Stefan Burns use the latest technology to search for the legendary treasure.
American Stonehenge
S1 Ep8
7.2
4th Apr 2017
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.
Secrets of the Underground Episode Guide
Capone's Escape Tunnels
S1 Ep1
7.3
14th Feb 2017
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.
Mystery of the Serpent Mound
S1 Ep2
7.4
21st Feb 2017
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.
America's Buried Massacre
S1 Ep3
7.4
28th Feb 2017
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.
Rocky Mountain Monsters
S1 Ep4
7.2
7th Mar 2017
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.
Great Lakes Bermuda Triangle
S1 Ep5
7.2
14th Mar 2017
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.
California's Hidden Doomsday
S1 Ep6
7.2
21st Mar 2017
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.
Secret History of the New World
S1 Ep7
7.4
28th Mar 2017
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.
American Stonehenge
S1 Ep8
7.2
4th Apr 2017
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.
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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The best rated episodes of Secrets of the Underground are:
Doomsday Volcano of the Gods S2E4 rated 7.7
Mystery of the Ice Cave S2E6 rated 7.7
Legend of the Nazi Gold S2E1 rated 7.6
Quest for the Gold Rush Fortune S2E8 rated 7.6
Atlantis in America S2E5 rated 7.5
The lowest rated episodes of Secrets of the Underground are:
Lost Pirate City Treasure S2E7 rated 7.1
Great Lakes Bermuda Triangle S1E5 rated 7.2
Rocky Mountain Monsters S1E4 rated 7.2
King Solomon's Treasures S2E2 rated 7.2
American Stonehenge S1E8 rated 7.2
The first episode of Secrets of the Underground aired on February 14, 2017.
The last episode of Secrets of the Underground aired on December 16, 2017.
There are 16 episodes of Secrets of the Underground.
There are 2 seasons of Secrets of the Underground.
