

TVReturning
Secrets of the London Underground
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Announced
In Production
Trailers
Premiered
Jul 19, 2021
Last Episode
S04E10“Old Street”
September 3, 2024
Release date
July 19, 2021
Seasons
4
Network
U&Yesterday
Rating
7.4 / 10
Genres
Cast
Overview
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.
Seasons
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