Unlike the previous three, this fourth series of The Sopranos largely eschews an overriding story arc in favour of developing several interrelated plot strands, most of which are then left dangling tantalisingly at the end. This year Tony's many extra-marital affairs finally come home to roost, even as he faces challenges to his leadership from within and without. Paulie Walnuts simmers with resentment over his perceived neglect, a resentment only exacerbated by Christopher's promotion; while Christopher's growing drug habit undermines Tony's trust in him. Paulie makes overtures to Johnny Sack and the New York family; Sack himself bears a deadly grudge against Ralph Cifaretto, and also embroils Tony in a dispute between the two families.
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