Whistleblower (The Office) fourth appearance on the show, after first appearing in "Sabre". Zach Woods made his ninth appearance on the show. While talking with his real estate agent on his cellphone, Dwight states that the office park is 1725 Slough Avenue. "Slough" is a reference to the UK edition of "The Office" which is set in Slough, United Kingdom. In its original American broadcast, "Whistleblower" was viewed by an estimated 6.60 million viewers with a 3.4 rating/10% share in the 18–49 demographic coming second in its timeslot after the season finale of "Grey's Anatomy", receiving the same rating as last week's episode,
The Office (U.S. season 4) segments which were combined and aired to produce 14 distinct episodes, directed by 11 directors. Greg Daniels, Craig Zisk, Ken Whittingham, Paul Lieberstein, Jason Reitman, Joss Whedon, Paul Feig, Julian Farino, Jeffrey Blitz, Randall Einhorn, and Tucker Gates each directed episodes during the season, with Feig and Whittingham directing multiple episodes. Although "The Office" was mainly filmed on a studio set at Valley Center Studios in Van Nuys, California, the city of Scranton, Pennsylvania, where the show is set, was also used for shots of the opening theme. Originally, NBC ordered a full season of 30 episodes. After 12 episodes