4 episodes
First episode: E1

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.
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4 episodes
First episode: E1Quick answers about this series, release status, and episode totals.
Inside the Tube: Going Underground first aired on April 3, 2017.
Inside the Tube: Going Underground currently has 1 season and 4 episodes.
Inside the Tube: Going Underground is ended, and no upcoming episode is currently scheduled.