09/18/2008 (09:00PM - 10:01PM) (Thursday) : IT'S TIME TO SAY GOODBYE--SPECIAL ONE HOUR SEASON FINALE-OSCAR NOMINEE AMY RYAN("Gone Baby Gone")GUEST STARS--It's Toby's (Paul Lieberstein) goodbye party at Dunder Mifflin and Michael (Golden Globe winner Steve Carell)demands a huge celebration that matches the joy in his heart. Angela (Angela Kinsey), sick of Michael's unreasonable last minute demands, refuses, and Michael turns to Phyllis (Phyllis Smith) to take over the party planning committee. Meanwhile, Dwight (Rainn Wilson) and Meredith (Kate Flannery) haze the new HR woman, Holly (Oscar Nominee Amy Ryan). John Krasinski, Jenna Fischer, B.J. Novak, Melora Hardin, Ed Helms, Leslie David Baker, Brian Baumgartner, Oscar Nunez, Mindy Kaling, Creed Bratton, and Craig Robinson also star.