S1 E1 · Holborn
Tim Dunn and Siddy Holloway explore the abandoned branch line between Holborn and Aldwych.
All episodes for series 1 of Secrets of the London Underground
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.
