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Watch Secrets of the London Underground Free… | StreamScout

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Series poster for Secrets of the London Underground

Secrets of the London Underground

2021 - 2024| 4 seasons| IMDb 5.1

Watch Secrets of the London Underground (2021) for free in the UK on Channel 4 and Pluto TV. Last updated 27 May 2026.

Streaming availability last checked 27 May 2026

Tim Dunn and Siddy Holloway explore the disused parts of London's tube network.

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Streaming info last checked: 13 hours ago

Cast

Tim Dunn Sigurbjörg Alma Ingólfsdóttir Chris Nix

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