<P> Stephen Colbert guest starred in the Halloween episode as Broccoli Rob, a former member of Here Comes Treble, Andy's a cappella group . The episode "Lice" guest starred Julius Erving playing himself as an investor in Jim's sports marketing business . Former NBC co-chairman and The Office executive producer Ben Silverman had a minor recurring role as one of Jim's colleagues . He appeared in the episodes "Here Comes Treble", "Suit Warehouse", "Customer Loyalty", and "Moving On". The fourteenth episode, "Junior Salesmen", featured several guest stars . These included Eric Wareheim as Gabor, Matt L. Jones as Zeke, and Will McCormack as Wolf . In the episode "Promos", athlete Ryan Howard played a version of himself . Comedian Roseanne Barr had a two - episode arc as a talent agent named Carla Fern, and first appeared in the episode "Stairmageddon". Michael Imperioli guest starred in the episode "Livin' the Dream" as Sensei Billy, acting as a foil for Dwight . The episode "A.A.R.M." guest starred Aaron Rodgers, Clay Aiken, Mark McGrath, Santigold, and Jessica St. Clair, all playing themselves . The series finale guest starred: Rachael Harris as Angela's sister; Joan Cusack and Ed Begley Jr. as Erin's biological parents; Malcolm Barrett as Stanley's replacement; and Bill Hader and Seth Meyers as themselves . </P> <P> The season aired on Thursdays at 9: 00 p.m., as part of the Comedy Night Done Right programming block . The season premiere, "New Guys" received a 2.1 / 6 percent share in the Nielsen ratings among viewers aged 18 to 49, meaning that 2.1 percent of viewers aged 18 to 49 watched the episode, and 6 percent of viewers watching television at the time watched the episode . The episode was viewed by 4.28 million viewers and became the lowest - rated season premiere for the series . In addition, it marked a 46 percent drop in viewership from the season eight premiere "The List". For the first sixteen episodes, the series was able to maintain roughly 4 million viewers . However, starting with the seventeenth episode "The Farm", ratings began to drop below this threshold . The series hit an all - time low with the twentieth episode, "Paper Airplane", which was viewed by only 3.25 million viewers, and received a 1.7 rating / 5 percent share . The series finale was viewed by 5.69 million viewers and received a 3.0 rating among adults between the ages of 18 and 49 . This made it the highest - rated episode of the season; it also marked an increase in the previous season finale, which garnered only 4.49 million viewers . "Finale" was the most watched episode of The Office since the eighth season episode "Pool Party", but ranked as the third - least watched finale of the series, following the eighth - and first - season finales . Although in its ninth season, The Office no longer was NBC's highest - rated scripted comedy series--it was surpassed by Go On--it often ranked as the highest - rated scripted NBC series on Thursday nights . Rainn Wilson argued that the show's lower ratings were a combination of the overall trend in lower television ratings in 2012, as well as the fact that "NBC didn't promote (the series) one bit". NBC increased their usual ad - price by 200 percent for the finale, asking for $400,000 per commercial . This was largely due to the anticipated increase in viewership that the finale would bring . </P> <P> The season ranked as the ninety - fourth most watched television series during the 2012--13 season, with an average of 5.061 million viewers . The season also tied with the CBS series Rules of Engagement and the Fox series American Dad! to be the forty - third most watched television series in the 18 - to 49 - year - old demographic . In this category, the show received a 2.6 rating . This meant that, on average, the season was viewed by 2.6 percent of all 18 - to 49 - year - olds . It was viewed by 3.32 million in this demographic . In terms of viewers, the ninth season ranked as the lowest - rated season of The Office, although it beat the first season's ranking, which was the 102nd most watched program for the 2004--05 year . </P> <P> The ninth season of The Office received moderately positive reviews from television critics . Based on seven critiques, review aggregation website Metacritic gave the ninth season of the show a 64 out of 100 rating, which denotes "generally favorable reviews". Entertainment website Holy Moly named the series one of the best shows during the 2012--13 season, writing that "this final season of The Office has been great" largely due to the fact that "every single relationship in the show rings true with the audience ." Michael Tedder of Vulture commented that he was "willing to call it the fourth best season of the show overall, which is by no means faint praise ." He explained that this was largely due to the fact that the "final season was a chance to see how everyone else would end up". Todd VanDerWerff of The A.V. Club wrote that "the tension between Jim and Pam in the final season ended up being highly controversial for a number of reasons...but it also provided the most hopeful moments of the series' final stretch" (although he did note that it was clear that the writers had "blatantly" set up the drama). He concluded that the finale was able to successfully return the series "to what had always been its heart--to have true fulfillment". Roth Cornet of IGN awarded the season an 8.5 out of 10, denoting a "great" year . She felt that the character growth in the final few episodes was particularly well executed, and the last stretch of the season helped raise it after a rocky start; ultimately, she felt that the writers were able to craft the proper ending for the show . She was, however, critical of Andy's characterization, noting that he was merely used as a plot device when convenient . Many critics argued that the season was an improvement, in both writing and humor, over the previous season . </P>

When do jim and pam make up in season 9