"Branch Wars" is here! Yes, in tonight's big Office episode, the Dunder folks do a field trip to the Utica branch, where Karen and Jim will reunite—and Dwight and Michael will go "undercover" in not so clever disguises. The episode is directed by Joss Whedon and puts our Dunder favorites front and center, so you know it's gonna be good.

Our Office Week concludes with the likes of Steve Carell, Rainn Wilson, Rashida Jones, Joss Whedon and John Krasinski, who are waiting to give you a preview. Press play above!

Then feel free to come back to the Comments section tonight to discuss what you thought of the episode.