The one-hour episode will air May 19, have Gervais appearing on the show for the second time, and has Arnett appearing for the first time. Also, that there will be other notable guest stars as well.
The title of the article (if you want to remain 100% spoiler/speculation free, move along now) is 'Ricky Gervais Reclaims His Office Job!' Posted by Michael Ausiello for TVLine, 19 JAN 2011.
Kathy Bates’ hilarious boss lady is returning for the season finale to deal with a “big scandal with the printers and a potential whistle blower situation,” reveals executive producer Paul Lieberstein.