Overview: Following workers across London over three years as they race to build an enormous supersewer on time and on budget. In this episode, tunnelling in central London finally begins.
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First Air Date: Jul 17, 2018Last Air date: Jul 31, 2018Season: 1 SeasonEpisode: 3 EpisodeRuntime: 60 minutesQuality: HDIMDb: 0.00 / 10 by 0 usersPopularity: 1.535Language: English