After five best-director nominations — and five losses, including one for the masterpiece "Raging Bull" — Martin Scorsese got payback big time last night, taking the Oscar for best director and best picture for the mob saga "The Departed" at the Academy Awards. There were no surprises for the acting awards: Forest Whitaker won best actor for his portrayal of Idi Amin in "The Last King of Scotland," and Helen Mirren took best actress for her spot-on turn as Queen Elizabeth II in "The Queen." Al Gore may not have won the presidency in 2000, but in 2007 he won an Oscar for best documentary — the global-warming cautionary statement "An Inconvenient Truth."