All episodes for series 3 of Secrets of the London Underground

S3 E1 · Camden

Tim Dunn and Siddy Holloway head to London's iconic Camden Town station.

S3 E2 · South Kensington

Tim Dunn and Siddy Holloway begin their journey at South Kensington.

S3 E3 · Green Park

Tim Dunn and Siddy Holloway are heading to Dover Street, now known as Green Park.

S3 E4 · British Museum

Tim Dunn and Siddy Holloway head to the abandoned station of British Museum.

S3 E5 · West Ashfield & Oval

With unique access, Siddy Holloway takes Tim Dunn to the 273rd Underground station - West Ashfield.

S3 E6 · Leicester Square

Tim Dunn and Siddy Holloway explore Leicester Square station.

S3 E7 · Heathrow

Tim Dunn and Siddy Holloway head to the sprawling Heathrow Airport underground stations.

S3 E8 · Shepherd's Bush

Tim Dunn and Siddy Holloway discover the hidden corners of Shepherd's Bush.

S3 E9 · Acton Works

Tim Dunn and Siddy Holloway snoop around TFL's massive maintenance facility - Acton Works.

S3 E10 · Archway

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