release dates of TV series Secrets of the London Underground

Secrets of the London Underground takes viewers on a fascinating journey beneath one of the world's most iconic cities. Led by railway historian Tim Dunn and engineer Siddy Holloway, this documentary series explores the hidden history and engineering marvels that lie beneath London's streets. Each episode delves into the remarkable stories behind the London Underground's construction, revealing abandoned stations, secret tunnels, and forgotten spaces that most passengers never see. The series combines historical investigation with modern exploration, uncovering how the Underground was built, the challenges engineers faced, and the role it played during significant moments in British history. From Victorian innovation to wartime shelter, the show illuminates the incredible infrastructure and human ingenuity that created the world's oldest underground railway network. Through expert commentary and exclusive access to restricted areas, viewers discover the Underground's secrets that have remained hidden for decades, offering a fresh perspective on this essential part of London's identity.