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Secrets of the London Underground poster

Secrets of the London Underground (2021)

Documentary

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.

IMDb rating
8.0 (219 votes)
Seasons
4
Streaming (US)
The Roku Channel · Amazon Prime Video · Tubi TV
Language
EN
Type
TV series
Browse seasons by rating shape → Open in Rising Shows app → View on IMDb

Ratings refreshed Jul 3, 2026 · 4 seasons indexed

Cast

Seasons

Season 1 (2021)

7.27 avg 6 episodes 7.1 → 7.3

Ep 1: 7.1 · 31 votesEp 2: 7.3 · 29 votesEp 3: 7.3 · 30 votesEp 4: 7.2 · 26 votesEp 5: 7.4 · 23 votesEp 6: 7.3 · 23 votes
Season 1 episodes — IMDb ratings
#TitleRatingVotes
1Holborn7.131
2North End7.329
3Piccadilly7.330
4Euston7.226
5St Mary's7.423
6Clapham7.323

Season 2 (2022)

7.88 avg 10 episodes 7.9 → 7.9 57 min avg

Ep 1: 7.9 · 20 votesEp 2: 7.7 · 15 votesEp 3: 7.8 · 13 votesEp 4: 7.8 · 12 votesEp 5: 8.1 · 13 votesEp 6: 8.0 · 14 votesEp 7: 7.8 · 13 votesEp 8: 8.2 · 12 votesEp 9: 7.6 · 12 votesEp 10: 7.9 · 11 votes
Season 2 episodes — IMDb ratings
#TitleRatingVotes
1Charing Cross / Kennington7.920
2Waterloo and City / Mark Lane7.715
3King William Street / Knightsbridge7.813
4Brompton Road / St Paul's7.812
5London Bridge / Ongar8.113
6King's Cross / Marlborough Road8.014
7Elizabeth Line / Angel7.813
8Quainton Road / Kingsway Tram Tunnel8.212
9Greenwich Power Station / Notting Hill Gate7.612
10Baker Street / Edgware Road7.911

Season 3 (2023)

7.75 avg 10 episodes 7.8 → 7.5 58 min avg

Ep 1: 7.8 · 13 votesEp 2: 7.8 · 12 votesEp 3: 8.0 · 15 votesEp 4: 7.9 · 14 votesEp 5: 8.0 · 12 votesEp 6: 7.5 · 11 votesEp 7: 7.7 · 12 votesEp 8: 7.6 · 10 votesEp 9: 7.7 · 10 votesEp 10: 7.5 · 11 votes
Season 3 episodes — IMDb ratings
#TitleRatingVotes
1Camden Town / Sloane Square7.813
2South Kensington / Marylebone7.812
3Green Park / Down Street8.015
4British Museum / Bayswater7.914
5West Ashfield / Oval8.012
6Leicester Square / Hyde Park Corner7.511
7Heathrow / Swiss Cottage7.712
8Shepherd's Bush / Elephant and Castle7.610
9Acton Works / Acton Town7.710
10Archway / ERU, Acton Works7.511

Season 4 (2024)

7.62 avg 10 episodes 7.9 → 7.9 44 min avg

Ep 1: 7.9 · 9 votesEp 2: 7.6 · 10 votesEp 3: 7.6 · 9 votesEp 4: 7.6 · 10 votesEp 5: 7.1 · 10 votesEp 6: 7.7 · 9 votesEp 7: 7.3 · 9 votesEp 8: 7.6 · 9 votesEp 9: 7.9 · 9 votesEp 10: 7.9 · 8 votes
Season 4 episodes — IMDb ratings
#TitleRatingVotes
1Earl's Court / Alperton7.99
2Paddington / Tottenham Court Road7.610
3Waterloo / Marble Arch7.69
4South Kentish Town / London Underground Control Centre7.610
5Thames Tunnel / Lambeth North7.110
6Ruislip Depot / Warren Street7.79
7Northumberland Park / Finsbury Park7.39
8Stockwell / DLR7.69
9Gloucester Road / Siemens Factory, Goole7.99
10Old Street / Hampstead7.98

Episode ratings and vote counts from IMDb. Poster, overview, and streaming data from TMDB. Data refreshed 2026-07-03.

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