Secrets of the London Underground

Tim Dunn and Siddy Holloway explore the labyrinthine Camden Town station, and the forgotten wartime shelter built beneath. Plus, Siddy visits a station which hides a lost river.

Tim Dunn and Siddy Holloway explore the disused areas of Green Park and discover their incredible wartime use. Also, the secrets of atmospheric, abandoned Down Street are revealed.

Tim Dunn and Siddy Holloway embark on a night-time track walk to the abandoned station of British Museum and Siddy explores the quirky history of Leinster Gardens.

Tim Dunn and Siddy Holloway visit the 273rd station on the network, one which no passenger will ever visit and Siddy sees new life breathed into a long-abandoned lift shaft at Oval.

Tim Dunn and Siddy Holloway head to Leicester Square, the gateway to LondonÕs theatreland, full of design and wartime secrets. And Siddy visits the world-famous Hyde Park Corner.

Tim Dunn and Siddy Holloway are packing their bags to discover the hidden corners of Heathrow's Underground. Siddy explores the subterranean world at Swiss Cottage station.

Tim Dunn and Siddy Holloway discover the hidden corners of ShepherdÕs Bush and hit the end of the line at Elephant and Castle, the Bakerloo LineÕs southern terminus.

Tim Dunn and Siddy Holloway explore the sprawling TFL maintenance facility - Acton Works. Staying in Acton, Siddy reveals an oddity of Underground history.