Watch On TV With These Channel Numbers
* All links provided are direct to the UK TV Play Website.
Series 1
HolbornSeries 1 - Episode 1
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.
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North EndSeries 1 - Episode 2
Tim Dunn and Siddy Holloway visit North End under Hampstead Heath. Abandoned before completion, the station became a Cold War bunker.
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PiccadillySeries 1 - Episode 3
Tim Dunn and Siddy Holloway explore the disused parts of Piccadilly Circus, and visit the long-abandoned Highgate surface station.
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EustonSeries 1 - Episode 4
Tim Dunn and Siddy Holloway explore the hidden parts of Euston, including unique features not found elsewhere and the bits set for demolition for HS2.
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St MarysSeries 1 - Episode 5
Tim Dunn and Siddy Holloway have a night-time track walk exploring long forgotten stations on the District line in Whitechapel.
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ClaphamSeries 1 - Episode 6
Tim Dunn and Siddy Holloway explore Clapham South deep level shelter where thousands of Londoners slept in the war.
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Series 2
Charing CrossSeries 2 - Episode 1
Tim Dunn and Siddy Holloway explore the disused Jubilee line areas of Charing Cross station, now more famous as a film location.
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Waterloo and CitySeries 2 - Episode 2
Tim Dunn and Siddy Holloway discover the hidden world of the Waterloo and City, the only line entirely underground.
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King William street, KnightbridgeSeries 2 - Episode 3
Tim Dunn and Siddy Holloway explore King William Street, the original terminus of the first electric Tube in the world.
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Brompton RoadSeries 2 - Episode 4
Tim Dunn and Siddy Holloway walk the Piccadilly line at night to explore the hidden World War 2 remains of Brompton Road.
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London BridgeSeries 2 - Episode 5
Tim Dunn and Siddy Holloway explore the disused parts of London Bridge. Siddy visits Ongar in Essex and nearby Blake Hall.
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Kings CrossSeries 2 - Episode 6
Tim Dunn and Siddy Holloway explore Kings Cross St Pancras, including a secret siding and the disused Thameslink station.
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Elizabeth LineSeries 2 - Episode 7
Tim Dunn and Siddy Holloway explore the brand new Elizabeth Line and have access to two of it's stations weeks before the line opens.
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Quainton Road and KingswaySeries 2 - Episode 8
Tim and Siddy visit Quainton Road in Buckinghamshire, 50 miles from London - and once on the underground. Siddy also explores Kingsway tramway tunnel.
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Greenwich Power StationSeries 2 - Episode 9
Tim Dunn and Siddy Holloway visit the cathedral-like Greenwich Power Station, which stands ready to power the tube at short notice.
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Baker StreetSeries 2 - Episode 10
Tim Dunn and Siddy Holloway explore the tube ststaion with the most platforms, Baker Street.
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Series 3
CamdenSeries 3 - Episode 1
Tim Dunn and Siddy Holloway head to London's iconic Camden Town station - a labyrinthine junction on the Northern Line.
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South KensingtonSeries 3 - Episode 2
Tim Dunn and Siddy Holloway begin their journey at South Kensington, home of Victoria and Albert Museum, the Science Museum and the Natural History Museum.
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Green ParkSeries 3 - Episode 3
Tim Dunn and Siddy Holloway are heading to a stunning station you won't find on modern-day tube maps - Dover Street, now known as Green Park.
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British MuseumSeries 3 - Episode 4
Tim Dunn and Siddy Holloway embark on a night-time track walk to the abandoned station of British Museum.
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West Ashfield & OvalSeries 3 - Episode 5
Tube fans would be right in thinking there are 272 Underground stations, but Siddy Holloway has such unique access, she is taking Tim Dunn to the 273rd - West Ashfield.
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Leicester SquareSeries 3 - Episode 6
Tim Dunn and Siddy Holloway are exploring a station in the beating heart of London's theatreland - Leicester Square.
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HeathrowSeries 3 - Episode 7
Tim Dunn and Siddy Holloway head to the sprawling Heathrow Airport underground stations - the first ever underground rail link between an airport and a city.
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Shepherd's BushSeries 3 - Episode 8
Tim Dunn and Siddy Holloway discover the hidden corners of Shepherd's Bush
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Acton WorksSeries 3 - Episode 9
Tim Dunn and Siddy Holloway snoop around TFL's gargantuan maintenance facility - Acton Works
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ArchwaySeries 3 - Episode 10
Tim Dunn and Siddy Holloway explore hidden parts of Archway. Once called Highgate to encourage more people to travel there before an actual Highgate station existed.
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