With its absurd death sequences and smart-ass dialogue, Showtime's Dead Like Me: The Complete First Season can be exhaustingly quirky. But buried underneath the eccentricities is a thoughtful observation about growing up. After teen malcontent Georgia Lass (Muth) gets pulverized by a Mir space-station toilet seat that's plunged to earth, she joins a motley crew of undead -- and unpaid -- soul collectors. In her postmortem quest to find a job, a pad, and a purpose, the feisty Lass learns to, well, live. Even when such ''death lessons'' border on predictable, the nimble cast keeps the show animated: Cynthia Stevenson (playing Georgia's ironically named mother, Joy) is brilliantly brittle; and Patinkin, as Rube, middle manager of the Great Beyond, does deadpan to great effect. Death should be proud. EXTRAS Fairly standard DVD fare, though on-screen 'zine Dead Like Us Weekly captures the series' irreverent tone (sample headline: ''Necromance! Do You Believe in Love After Life?'').