All episodes for series 1 of Secrets of the London Underground

S1 E1 · Holborn

Tim Dunn and Siddy Holloway explore the abandoned branch line between Holborn and Aldwych.

S1 E2 · North End

Tim Dunn and Siddy Holloway visit North End under Hampstead Heath.

S1 E3 · Piccadilly

Tim Dunn and Siddy Holloway explore the disused parts of Piccadilly Circus.

S1 E4 · Euston

Tim Dunn and Siddy Holloway explore the hidden parts of Euston.

S1 E5 · St Marys

Tim Dunn and Siddy Holloway explore forgotten stations on the District line; Whitechapel.

S1 E6 · Clapham

Tim Dunn and Siddy Holloway explore Clapham South deep level shelter.