Ron gets married, Leslie goes to London to receive an award, Ben and Andy try to get a grant from a rich Englishman, and Tom discovers the identity of his new business rival.
Ron's honeymoon doesn't go as planned, Leslie gives an unpopular speech at her award ceremony, Andy considers a business proposal, and Tom attempts to compromise with his rival.
Leslie gloats instead of trying to help when she learns of Eagleton's budget crisis, Ron tries to get himself off the grid, and Ann takes April on a road trip to Bloomington.
While the parks department works side-by-side with their former Eagleton counterparts, Leslie is blindsided and heartbroken by the news that Ann and Chris are leaving Pawnee.
Leslie blows off Ben's birthday party to filibuster councilman Jamm's motion, Andy pays a surprise visit to April, Tom tries to win a stuffed bear for Nadia, and Ron gets frustrated by an arcade hunting game.
Leslie goes into a funk after she loses the recall election, the rest of the office sets up a Haunted House, and Tom turns to Ron and a local online trendsetter to help save Rent-a-Swag.
Leslie's new bold attitude as a lame duck costs Ben his job at Sweetums, Ron helps Chris build a crib, and the department tries to find the perfect dog that matches the personality for every Parks Department employee.
Chris mediates one final skirmish between Leslie and councilman Jamm, Ben begins a new job as an accountant, and Ron lets Donna and Tom try to sell one of his cabins.
Leslie has a new opportunity to run for city council just as her term is ending, Tom comes up with a new business venture after selling Rent-a-Swag, and Chris and Ann decide to find out the sex of their baby.
Leslie battles with Tom on her first day back with the Parks Department, the gang pranks Ben on his first day as City Manager, and Chris and Ann shop for a ring after their engagement.
A workplace dispute between Leslie and Ben interferes with their personal life, Andy gets a job playing at a child's birthday party, and Ann's complaints about Chris ruins the department's "Whine and Cheese Club."
On Ann and Chris's last night in Pawnee, Leslie throws a grand farewell party and attempts to fulfill one last promise. Meanwhile, Tom, Ben, Ron, and Andy struggle to find the perfect going away gift for Chris.
Ben tries to surprise Leslie with an anniversary gift; Tom and Andy help Leslie put a positive spin on the merger; April flexes her authority as Donna's boss.
Leslie's efforts to take down the wall separating Eagleton and Pawnee yield unexpected results; Ben and Tom meet with possible sponsors for the concert; Ron finds a new hobby.
A pair of radio shock jocks threaten to ruin Leslie's town slogan contest, April and Donna help Tom find a restaurant site, and Andy discovers Ron's alter-ego, Duke Silver.
Leslie throws a hasty Galentine's Day in an attempt to find a replacement for Ann. Tom and Ben look to finalize a deal on tents for the Unity Concert, while Ron finds himself looking after Andy.
Leslie makes a shocking personal discovery while she and Andy try to get a headline act for the Unity Concert. Meanwhile, Ben is upset about his parents selling the beach house, and Tom gets a sommelier for his bistro.
Leslie and Ben run a charity auction to raise funds for the unity concert. April steps in to manage Andy's schedule, while Donna asks Ron for help with her ex-boyfriend.
Leslie debates whether to take the job with the National Parks Service during a convention in San Francisco while Ben tries to get free wifi for Pawnee. Meanwhile in Pawnee, Tom decides to open his bistro early.
During the Unity Concert, Leslie invites some coworkers to join her at her new job in Chicago, while Andy thinks about reuniting Mouse Rat. Meanwhile, Tom's Bistro prepares for the Unity Concert after-party.
