|Aldgate to Amersham, Chesham, Watford and Uxbridge
The world's first underground railway is seen in the other direction (this time with the aid of an additional light) eastbound from a refurbished A60/62 stock train to Baker Street. North from here the railway is literally unique, retaining the Underground's only fleet of commuter-style trains - the legacy of the Metropolitan Railway company's ambitions to be a main line.
As well as the fast run to Amersham, much of it over multiple tracks, we take the branches to Uxbridge and Watford - the latter destined soon to become history. Finally there is the single line Chesham branch - London Underground's furthest outpost.
Narrated by Rob Curling
Duration 90 minutes