Where To Stream Underground Marvels Season 1 Episode 1
Secrets of the Rock
- Aired October 17, 2019
- 60 Min
- Rated 9.5
- Number 2 Of 16 Rated Episodes
A hidden, subterranean city built within the Rock of Gibraltar was an immense fortress to control the seas during World War II, and new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.