This season of True Blood has continued to kick into overdrive, delivering yet another taut and disturbing installment that not only advanced the overarching plot of the fourth season but also pushed several characters past their breaking point, revealing the skull beneath the skin quite literally in some cases. Last night's episode ("I Got a Right to Sing the Blues"), written by Alan Ball and directed by Michael Lehmann, should serve as a prime example of the sort of dizzying storytelling that True Blood excels at, juggling multiple subplots and weaving together several story strands as the direction that Season Four is taking becomes all the more clear. But the main narrative throughline would appear to be the characters' individual quests for their humanity, between the desires of the flesh and the fulfillment of the spirit, the insubstantial, and the ethereal. For the supernatural creatures that populate the shadowy world of True Blood , humanity is a vestment t