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.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | 0 | ||
| Season 1 | April 2017 | April 2017 | 4 |
| Unassigned Episodes | 0 |
| Season | From | To | Episodes |
|---|---|---|---|
| Unassigned Episodes | 4 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 4 |
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