Secrets of the London UndergroundSeason 12021 · 6 episodesEpisodes1HolbornTim 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.2North EndVisit one of London Underground’s most secret places: North End under Hampstead Heath. Abandoned before completion, the station became a Cold War bunker.3Piccadilly CircusExplore the disused parts of Piccadilly Circus, the grandest station on the London Underground. And they also visit the long-abandoned Highgate surface station.4Euston and York RoadExplore 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.5St Mary's, Aldgate East and Oxford CircusHave 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.6Clapham South and MoorgateExplore 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.Season 2Season 3Season 4
