Just before the new year, "The Colbert Report" will air its final episode, and the world will lose one of its most valuable political satirists: Stephen Colbert.On Thursday night, Colbert announced the date for the final "Colbert Report": December 18, 2014. (And he made a push for folks to buy his book "America Again: Re-becoming the Greatness We Never Weren't.")"Stephen Colbert, the guy you've seen here every night for nine years will be gone," Colbert reminded the audience.