Ray Romano, James Spader, and Catherine Tate will join Will Arnett and Ricky Gervais as guest stars on Steve Carell’s last episode of The Office. They’ll appear as candidates to be office manager. So will one of them be Carell’s replacement? You can probably rule out Romano, who is committed to Men of a Certain Age. Arnett also just got an NBC pilot of his own, while Gervais is unlikely to return to the show he created in Britain. TVLine says Spader and Tate are the only two with “ a realistic chance” of taking over.