Replacing the departed Steve Carell, the Emmy winner will reprise his role as Robert California, who interviewed for the position of manager (vacated by Carell's Michael Scott) at Dunder-Mifflin's Scranton branch during a hilariously intense cameo last spring.
California is "this uber-salesman that has a power to convince and manipulate, like a high-class weirdo Jedi warrior," said Paul Lieberstein (who plays Toby and serves as one of the show's executive producers.) "He'll have been hired over the summer as the new manager, but within hours, got himself promoted. Within days, he took over the company."
Accordingly, the remaining Dunder-Mifflin employees (including castmates Jenna Fischer, John Krasinski and Rainn Wilson) "have no tools for dealing with this guy," Lieberstein adds.