Secrets of the London Underground (2021)
- HD 1080
- Runtime: 44m.
- Status: Returning Series
0
- Languages: en
- Country: United Kingdom
- Stars: Tim Dunn, Sigurbjörg Alma Ingólfsdóttir
- keywords: subway
- Production_studio: Brown Bob Productions
- Seasons: 4
- Episodes: 36
- First air date: 2021-07-19
- Last air date: 2024-09-03
- The Secrets of the London Underground is featured in the top rankings of 2021
- #97 in Top Documentary Series of 2021
Railway historian Tim Dunn and Siddy Holloway from the London Transport Museum explore hidden areas of the London Underground that—despite being just feet away from where millions of people regularly travel—hardly anyone knows about. The pair will explore abandoned tunnels, secret bunkers and hidden staircases that have been concealed from public view for years.