7.5/1016 votes#1 - Capone's Escape Tunnels
Season 1 Episode 1 - Aired 2/14/2017
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.
Director: N/A
Writer: N/A
- 7.3/1018 votes
#2 - Mystery of the Serpent Mound
Season 1 Episode 2 - Aired 2/21/2017
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.
Director: N/A
Writer: N/A
- 7.8/1020 votes
#3 - America's Buried Massacre
Season 1 Episode 3 - Aired 2/28/2017
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.
Director: N/A
Writer: N/A
- 7.6/1017 votes
#4 - Rocky Mountain Monsters
Season 1 Episode 4 - Aired 3/7/2017
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.
Director: N/A
Writer: N/A
- 7.9/1015 votes
#5 - Great Lakes Bermuda Triangle
Season 1 Episode 5 - Aired 3/14/2017
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.
Director: N/A
Writer: N/A
- 6.9/1014 votes
#6 - California's Hidden Doomsday
Season 1 Episode 6 - Aired 3/21/2017
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.
Director: N/A
Writer: N/A
- 7.5/1013 votes
#7 - Secret History of the New World
Season 1 Episode 7 - Aired 3/28/2017
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.
Director: N/A
Writer: N/A
- 7.2/1014 votes
#8 - American Stonehenge
Season 1 Episode 8 - Aired 4/4/2017
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.
Director: N/A
Writer: N/A
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!
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.
Genres:RealityDocumentary
Network:Science
Season 1 Ratings Summary
"Capone's Escape Tunnels" is the best rated episode of "Secrets of the Underground" season 1. It scored 7.5/10 based on 16 votes. Directed by N/A and written by N/A, it aired on 2/14/2017. This episode is rated 0.2 points higher than the second-best, "Mystery of the Serpent Mound".