The off-kilter vampire series True Blood is drawing audiences to HBO the likes of which the pay-TV network hasn't seen since the days of The Sopranos. Sunday's episode averaged 5.3 million viewers, the largest audience HBO has drawn for a scripted series since April 2004, excluding The Sopranos runs. HBO said that when additional airings of the show were included, plus DVR viewing and HBO On Demand, the True Blood episode actually drew 11.6 million.