11774.+6790
17%
6.3 (196)Age rating
CC
TV-PG
2 Seasons - 42min
Buy
Starts at $1.99 / Episode
Runtime
42min
Age rating
TV-PG
Quality
SD
CC
HD
TV-PG
2 Seasons - 42min
Buy
Starts at $2.99 / Episode
Runtime
42min
Age rating
TV-PG
Quality
HD
PROMOTED
CC
HD
TV-PG
2 Seasons - 42min
Buy
Starts at $2.99 / Episode
Runtime
42min
Age rating
TV-PG
Quality
HD
CC
HD
TV-PG
2 Seasons - 42min
Subscription
$33.00 / month
Available until
1/1/2026
Runtime
42min
Age rating
TV-PG
Quality
HD
CC
HD
TV-PG
2 Seasons - 42min - English
Then $5.99 / month
Runtime
42min
Age rating
TV-PG
Quality
HD
Audio languages
English
Subtitle languages
English
CC
HD
TV-PG
1 Season - 42min
Subscription
$62.99 / month
Runtime
42min
Age rating
TV-PG
Quality
HD
CC
HD
TV-PG
2 Seasons - 42min
Free
retail price
Available until
1/1/2026
Runtime
42min
Age rating
TV-PG
Quality
HD
CC
HD
TV-PG
2 Seasons - 42min - English
Buy
Starts at $2.99 / Episode
Runtime
42min
Age rating
TV-PG
Quality
HD
Audio languages
English
CC
TV-PG
2 Seasons - 42min
Buy
Starts at $1.99 / Episode
Runtime
42min
Age rating
TV-PG
Quality
SD
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Currently you are able to watch "Secrets of the Underground" streaming on Discovery+ Amazon Channel, Philo, YouTube TV or buy it as download on Apple TV, Fandango At Home, Amazon Video.
You can also stream the title for free on Spectrum On Demand.
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.
