Secrets of the London Underground

S4 E7 ∙ Northumberland Park ∙

Tim Dunn and Siddy Holloway explore the maintenance depot at Northumberland Park in north London.

Series Selector for Secrets of the London Underground

All episodes for series 4 of Secrets of the London Underground

S4 E6 · Ruislip Depot

Tim Dunn and Siddy Holloway explore the maintenance depot at the end of the Central Line.

S4 E8 · Stockwell

Tim Dunn and Siddy Holloway explore Stockwell station on the Victoria Line.