第 5 季 共 26 集
播出时间：2008年9月26日
第 1 集 Weight Loss
播出时间：2008年9月26日
Michael tries to motivate the Scranton branch to lose weight as part of an interoffice competition. Jim is lost after Pam leaves for art school in New York, and Angela continues to see Dwight even though she is now engaged to Andy.
第 2 集 Business Ethics
播出时间：2008年10月10日
Holly leads a business ethics seminar as a result of Ryan's scandal, and when Michael encourages everyone to share their own unethical work behaviors, things get out of hand. Meanwhile, Jim messes with Dwight by requiring him to follow the Dunder Mifflin "Time Theft" policy.
第 3 集 Baby Shower
播出时间：2008年10月17日
Michael practices for the birth of Jan's baby by having Dwight go over possible birthing scenarios. Meanwhile, Michael tells Holly that he will pretend to dislike her for Jan's benefit.
第 4 集 Crime Aid
播出时间：2008年10月24日
Michael and Holly have sex for the first time, and Michael holds a fund-raiser for the office after it is burglarized. Dwight confides in Phyllis after Andy and Angela set a wedding date, and Jim runs into Pam's ex-fiancé Roy.
第 5 集 Employee Transfer
播出时间：2008年10月31日
Pam is embarrassed when she is the only person at corporate wearing a costume on Halloween. Holly and Michael take the long trip to Nashua after they get some shocking news from corporate. Meanwhile, Dwight torments Andy and tries to get under his skin.
第 6 集 Customer Survey
播出时间：2008年11月7日
Dwight and Jim are shocked when they get the results of the annual customer survey report. Pam and Jim decide they want to spend every minute together using their bluetooth phones. Meanwhile, Angela and Andy pick an unusual location for their wedding.
第 7 集 Business Trip
播出时间：2008年11月14日
Michael is thrilled when he learns that David Wallace is sending him to Canada for a business trip, and wants to bring both Andy and Oscar with him. Jim misses Pam and he can't wait until she returns from art school.
第 8 集 Frame Toby
播出时间：2008年11月21日
A mysterious person in the office has made a huge mess in the microwave and will not clean it up. Meanwhile, Michael has to come to terms with the fact that there have been certain personnel changes in his staff without his knowing.
第 9 集 The Surplus
播出时间：2008年12月5日
Michael has to spend the office surplus by they end of the day, but he can't decide between a copier or new chairs. Dwight plays a dirty trick on Angela as they prepare for Andy and Angela's wedding on the beet farm.
第 10 集 Moroccan Christmas
播出时间：2008年12月12日
Phyllis' Moroccan-themed holiday party goes up in flames when Meredith's hair catches on fire and Michael is forced to deal with the accident. Meanwhile, Dwight corners the market on the hottest toy of the Christmas season.
第 11 集 The Duel
播出时间：2009年1月16日
The office is on eggshells because Andy still hasn't found out about fiancee Angela's affair with Dwight. When Michael spills the beans, Dwight and Andy take matters into their own hands. Meanwhile, Michael is nervous about being called down to corporate for a meeting with Wallace.
第 12 集 Prince Family Paper
播出时间：2009年1月23日
Michael and Dwight go undercover to do a bit of industrial espionage on a paper company competitor. Meanwhile, the rest of the office holds a debate to settle the question: is Hilary Swank hot?
第 13 集 Stress Relief
播出时间：2009年2月2日
Dwight must makes amends with the office after his fire safety seminar goes awry; Michael tries to get his employees to relax; Andy becomes convinced that Pam and Jim are film gurus.
第 14 集 Lecture Circuit (1)
播出时间：2009年2月6日
Michael goes on a speaking tour of the other branches to explain Scranton's relative success, accompanied by his driver, Pam. Back at the office, Dwight and Jim - now heads of the party planning committee - forget a birthday, with severe consequences. Meanwhile, Andy falls for someone he should not.
第 15 集 Lecture Circuit (2)
播出时间：2009年2月13日
Michael and Pam continue their tour of the branches with Michael taking a lesson from their visit to Utica. Dwight and Jim struggle to fulfill their new party planning duties with a grumpy staff. Angela's new cat causes a stir.
第 16 集 Blood Drive
播出时间：2009年3月6日
A mystery woman at the office blood drive catches Michael's eye. Dwight and Kevin both find women at the "Lonely Hearts Party," while Jim and Pam are forced to leave because of PDAs—so they have lunch with Phyllis and Bob.
第 17 集 Golden Ticket
播出时间：2009年3月13日
Michael's idea to use "Golden Tickets" for prizes for clients causes a problem in the office. Kevin seeks advice from Andy, Jim, and Pam about dating.
第 18 集 New Boss
播出时间：2009年3月20日
Michael has big plans for his 15th anniversary party at Dunder Mifflin, but is in for a shock when the new, no-nonsense Vice President has some ideas of his own. Meanwhile, Jim's prank on Dwight has some unexpected results.
第 19 集 Two Weeks
播出时间：2009年3月27日
Michael's relationship with the new vice president becomes increasingly tense, as Michael finds an excuse to goof off even more than usual. Meanwhile, Pam faces the challenge of a new copier and Kelly develops a crush.
第 20 集 Dream Team
播出时间：2009年4月10日
The situation between Jim and his new boss Charles gets worse when they are competing in a parking lot soccer game. Michael tries to start his new business, but has trouble leaving his house.
第 21 集 Michael Scott Paper Company
播出时间：2009年4月10日
Tension and disillusionment begin to emerge as Michael, Pam, and Ryan move the Michael Scott Paper Company into a cramped "workspace" at the business park.
第 22 集 Heavy Competition
播出时间：2009年4月17日
Dwight's loyalty to Michael is tested when he finds a new hero in Charles. Meanwhile, Andy tries to provide for all of Jim's emotional needs.
第 23 集 Broke
播出时间：2009年4月24日
Michael's new company struggles to make early morning deliveries while the office tries to get their expense reports in on time after Angela enforces Dunder Mifflin's policy.
第 24 集 Casual Friday
播出时间：2009年5月1日
Michael has to mediate a dispute within his new sales team. Meanwhile, trouble brews in the office when several employees take the term "casual" Fridays too loosely.
第 25 集 Cafe Disco
播出时间：2009年5月8日
Michael decides to open a cafe-disco in his old office. Pam and Jim are planning a secret trip.
第 26 集 Company Picnic
播出时间：2009年5月15日
At the company picnic, Michael and Holly are reunited for the first time since their split. The rest of the staff competes in games, such as the volleyball tournament.
