
About this season
Granted special access to the secret workings of the Tube, and with the aid of the London Underground staff who know it best, engineer Rob Bell discovers the fascinating hidden history of how London's iconic metro was built.
Episodes (4)

1. The World's First Deep Tube Line
Aired 3 April 2017 • 45 min
Rob explores the construction of the world's first deep Tube Line known today as the Northern Line, which runs 36 miles through London and connects the boroughs north and south of the Thames. 700,000 passengers rely on it every day.

2. The Busiest Line in Britain
Aired 10 April 2017 • 45 min
The Central Line is the artery that travels across the heart of London. At 46 miles, it is the longest of all tube lines. But as Rob discovers, it is a line constantly battling it's Victorian legacy.

3. The World's First Underground
Aired 17 April 2017 • 45 min
London's Metropolitan Line was the world's first underground railway, and is still used by 70 million passengers each year.
4. The First Modern Tube Line
Aired 24 April 2017 • 45 min
The Piccadilly Line is famed for its glamorous stops, but Rob Bell discovers how it also changed public transport as we know it.