Drea de Matteo won her Emmy Award not just for "Long Term Parking" but also for "Irregular Around the Margins," a terrific and plausible hour of "The Sopranos." In "Irregular" (a title worthy of praise), Tony is slightly off-kilter, because he believes that he may have cancer. Meanwhile, Adriana has colitis and a deepening addiction to drugs. Because Adriana is attractive and kind, Tony finds himself struggling with boundaries. The two leads head out into the night, in search of heroin--and we can infer how the evening will end. Except that a car crash occurs, and the crash actually spares everyone from a real catastrophe. Where there's smoke, there's fire. Second-tier figures in Tony's life can't accept that this car ride was "innocent." Rumors spread. Adriana must have been dishing out a blow job. That's why Tony swerved and crashed his car. The episode is extraordinary in its handling of an "open secret....