Secrets of the London Underground
We checked 8 streaming services in India on 04 Jun 2026 at 16:23 IST
About
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.
Cast
Episodes
Season 1
Holborn
Tim Dunn and Siddy Holloway explore the abandoned branch line between Holborn and Aldwych. And at Holloway Road they find out about the Tube's only spiral escalator.
North End
Visit one of London Underground’s most secret places: North End under Hampstead Heath. Abandoned before completion, the station became a Cold War bunker.
Piccadilly Circus
Explore the disused parts of Piccadilly Circus, the grandest station on the London Underground. And they also visit the long-abandoned Highgate surface station.
Euston and York Road
Explore the hidden parts of Euston, including unique features not found elsewhere and the bits set for demolition for HS2. Siddy also visits York Road station.
St Mary's, Aldgate East and Oxford Circus
Have a night-time track walk exploring long forgotten stations on the District line in Whitechapel. And they discover how sprawling Oxford Circus was first built.
Clapham South and Moorgate
Explore Clapham South deep level shelter, where thousands of Londoners slept in the war. They also visit Moorgate, and the remains of a tunnelling machine there.
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Watch Secrets of the London Underground Online Free — All Episodes in HD
If you've been searching for Secrets of the London Underground all episodes in HD, Bowood.TV has you covered. This well-rated English documentary title from 2021 is available to stream instantly — no ads to fight through, no paid subscriptions, no annoying redirects.
About Secrets of the London Underground
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. Across 4 seasons and 36 episodes, originally airing on U&Yesterday, with status "Returning Series".
Secrets of the London Underground Cast and Characters
The cast features Tim Dunn (as Self - Presenter) and Sigurbjörg Alma Ingólfsdóttir (as Self - Presenter). Their performances are a major reason Secrets of the London Underground has built such a passionate audience.
Where to Watch Secrets of the London Underground Online
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▶ Watch Secrets of the London Underground NowWhy People Are Watching Secrets of the London Underground
Secrets of the London Underground flies under the radar but it deserves your attention. What makes it work is a tone and style that's hard to find elsewhere. If you enjoy English storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.
Frequently Asked Questions about Secrets of the London Underground
Where can I watch Secrets of the London Underground online for free?
You can watch Secrets of the London Underground online free on Bowood.TV. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How many episodes does Secrets of the London Underground have?
Secrets of the London Underground has 36 episodes across 4 seasons. All episodes are available to stream right here on Bowood.TV.
Is Secrets of the London Underground good? What's the rating?
Secrets of the London Underground holds a 7.4/10 rating based on 5 reviews — well above average.
Who is in the cast of Secrets of the London Underground?
The main cast includes Tim Dunn and Sigurbjörg Alma Ingólfsdóttir.
Is Secrets of the London Underground available in English?
Yes — Secrets of the London Underground was originally produced in English and that's the version you'll stream here on Bowood.TV.
When was Secrets of the London Underground released?
Secrets of the London Underground first aired in 2021.
Do I need an account to watch Secrets of the London Underground on Bowood.TV?
No. Bowood.TV is free and you can watch Secrets of the London Underground without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Series You Might Like
If you enjoyed Secrets of the London Underground, check out Shoot to Kill: Terror on the Tube, The Fifteen Billion Pound Railway, The Metro: A Rail Life Story, Subways of the World, and The Tube: Going Underground.
Frequently Asked Questions
Where can I watch Secrets of the London Underground for free?
You can watch Secrets of the London Underground online for free on Bowood.TV. All 36 episodes across 4 seasons are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.
How many seasons and episodes does Secrets of the London Underground have?
Secrets of the London Underground currently has 4 seasons and a total of 36 episodes. The series status is "Returning Series", so the episode count may grow as new seasons are released. You can browse the full episode list on Bowood.TV and continue watching from where you left off.
What is Secrets of the London Underground about?
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… It belongs to the Documentary genre.
In which language is Secrets of the London Underground originally available?
Secrets of the London Underground was originally produced in English. On Bowood.TV the show is available in its original English audio, which is the most authentic way to experience the dialogue, music, and performances. Check the player options on the watch page for available subtitle tracks.
When was Secrets of the London Underground first released?
Secrets of the London Underground first premiered on July 19, 2021 (2021). The show is still ongoing with new episodes being released.
All Seasons
Browse every season of Secrets of the London Underground — 4 seasons in total
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