After taking an eight-month powder, Alias returned last night with a vengeance. The two-hour premiere in which (spoiler alert!) Syd learned that her evil mama died at the hands of her duplicitous dada averaged 16 million viewers, the show's best ratings in three years. Of course, Jennifer Garner and Co. got a little help from lead-in Lost, which drew its largest audience to date 21.5 million viewers. All told, ABC may want to cut J.J. Abrams that blank check now.