The Mill: Season 1, Episode 4

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Lucy and Esther believe that Mr Timperley is responsible for Catherine's disappearance and become determined to expose him but are blocked every time they try. Esther's sister Martha discovers one of the notes Esther left there and travels to Quarry Bank Mill hoping to find her. Robert returns to the Mill with the news that parliament has not passed the Ten Hour Bill, meaning children will continue to have to work 12-hour days.