Find out when Secrets of the London Underground is on TV today, tonight and this week at the UK TV Listings Guide.
Secrets of the London Underground is scheduled to air at these times (may include spoilers):
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
More details for Secrets of the London Underground, Sat 20, 8:00 am
Tim Dunn and Siddy Holloway visit North End under Hampstead Heath. Abandoned before completion, the station became a Cold War bunker
More details for Secrets of the London Underground, Sat 20, 9:00 am
Tim Dunn and Siddy Holloway explore the disused parts of Piccadilly Circus, the grandest station on the London Underground, and visit the long-abandoned Highgate surface station
More details for Secrets of the London Underground, Sat 20, 10:00 am
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
More details for Secrets of the London Underground, Sat 20, 11:00 am