Secrets of the London Underground S1E1 backdrop

Secrets of the London Underground poster

Secrets of the London Underground (2021)

Name: Holborn
Released: 2021-07-19

S1E1 Holborn

Jul 19, 2021 Season 1 Episode 1 Documentary

Tim Dunn and Siddy Holloway venture into the deserted branch line connecting Holborn and Aldwych. During their exploration at Holloway Road, they discover fascinating details about the Tube's unique spiral escalator.