Secrets of the London Underground
We checked 8 streaming services in India on 04 Jun 2026 at 13:23 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.
Where does Secrets of the London Underground rank today?
Secrets of the London Underground is #10000 on the CineFlixo Daily Streaming Charts today.
- Highest: #10000
- Top 10: 0 days
- Top 100: 0 days
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, CineFlixo has you covered. This well-rated Inglés 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
Want to watch Secrets of the London Underground online without paying? CineFlixo is the easiest way. Click play and the series starts in seconds. No popups, no "5 day trial that auto-charges" — just the show.
▶ 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 Inglés 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 CineFlixo. 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 CineFlixo.
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 Inglés?
Yes — Secrets of the London Underground was originally produced in Inglés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
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 CineFlixo?
No. CineFlixo 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 The Fifteen Billion Pound Railway, The Metro: A Rail Life Story, Shoot to Kill: Terror on the Tube, 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 CineFlixo. 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 CineFlixo 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 CineFlixo 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
💬 Comments0
Join the conversation
Share your thoughts, rate episodes, and connect with other fans
Hey everyone! 👋 Welcome to the discussion.
Feel free to share your thoughts about this series — what did you love, what surprised you, which episodes are your favorites? 🎬
Got ideas for what we should add to CineFlixo? Want to suggest a series? Drop it here! We read every comment ✨
Similar English Documentary Shows
More English series like Secrets of the London Underground you may enjoy
Recommended for You
Based on this series
