The best investigative reporting (and documentaries) being produced today started a new season yesterday when Frontline aired “Cheney’s Law,” covering Dick Cheney’s continuing campaign to use the office of the Vice President to radically expand the conception of executive authority (see the extensive Washington Post series on the same subject). Along with the new season is a new website, and they stream their videos using flash (like YouTube) now, instead of the old system of Windows Media Player and Real Player.