Season 3 begins when Reese Witherspoon returns to the office. At the same time, a focus-group study influences the staff, who also try to please Chelsea by attending an expensive fund-raiser with Monica Potter.
The staff convince Sarah to use a fake assistant to book a hotel room for herself and baseball player Giancarlo Stanton; Heather begins commuting with a baby doll, so that she can use the carpool lane; and Jiffy believes he's the object of a gay crush.
Jiffy is convinced that there are romantic intentions behind Chelsea hiring him to ghostwrite a book for her dog; at the same time, Brad and Sarah investigate an able-bodied accountant who gets better parking using a handicapped placard; and the office is overflowing with free house slippers from a sponsor.
The love and admiration the staff show for guest host Ross Mathews worries a jealous Chelsea. Elsewhere, Heather finds herself turned on by Chelsea's dog; and Chuy annoys the writers by taking a more active role in the creative process of the show.
Heather celebrates the release of her book with a dinner party that puts Chelsea face-to-face with the Kardashians; at the same time, the staff go out of their way not to socialize with show announcer Mike Rock; and Jen's refusal to make Sarah her emergency contact creates a rift between the friends.