Secrets of the London Underground: Story, Cast and Series Facts

Story and premise

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 explore abandoned tunnels, secret bunkers and hidden staircases that have been concealed from public view for years. They will use their unique and privileged access to tell the story of places including London's most clandestine tube station; the former terminus of the world's first electric railway; and a station now only accessible by getting a train driver to stop at just the right place, but which played a key role during the Second World War.

Series details

• Title: Secrets of the London Underground
• Format: Documentary
• Language: English
• Premiere date: 2021-07-19
• Status in TVmaze: Running
• Network listed by TVmaze: U&Yesterday
• Network country: United Kingdom
• Typical episode runtime: 60 minutes
• TVmaze community rating: 6.6/10
• TVMaze ID: 54475
• IMDb ID: tt14256490
• TVDB ID: 405934

Cast and credited roles

• Tim Dunn — Tim Dunn
• Siddy Holloway — Siddy Holloway

Seasons in the TVmaze catalogue

• Season 1: premiered 2021-07-19; final listed air date 2021-08-23; episode order: 6.
• Season 2: premiered 2022-05-05; final listed air date 2022-07-07; episode order: 10.
• Season 3: premiered 2023-07-04; final listed air date 2023-09-05; episode order: 10.
• Season 4: premiered 2024-07-02; final listed air date 2024-09-03; episode order: 10.

Source and licence

Adapted from Secrets of the London Underground on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.