WPC 56 , Series 3 : Walk the Line

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Walk the Line: The chief suspect in Brigadier Morris's murder is a man who served with Annie's father in World War II. Inspector Briggs struggles to be a good husband and leaves himself vulnerable to a keen-eyed foe. Station secretary Susie Nightingale strikes a note for women's equality over membership in the police band, to the dismay of Desk Sergeant Swift.