Down the Tube
- Episode aired Jun 16, 1997
An investigation into the London Underground system reveals 40-year-old trains, signals and tracks that have been patched up since the war, and 100-year-old tunnels that are crumbling.An investigation into the London Underground system reveals 40-year-old trains, signals and tracks that have been patched up since the war, and 100-year-old tunnels that are crumbling.An investigation into the London Underground system reveals 40-year-old trains, signals and tracks that have been patched up since the war, and 100-year-old tunnels that are crumbling.