Leslie and Andy go to Washington on business--and to see Ben and April. Back in Pawnee, Ron is in charge of the employee barbecue, and Tom and Ann pretend to still be together.

Leslie faces threats and backlash if she votes in favor of a "soda tax," Ben tries to suck up to his interns after he discovers that they're politically connected, and Andy's efforts to get in shape send Chris into a depression.

Leslie is forced to make a sacrifice to assure passage of a bill, Ron meets a single woman while fixing a pothole, and Ben and April are stuck in a parking lot and can't make it back to Pawnee.

Leslie gets in trouble with her initiative to teach safe sex to senior citizens, Ron tries to help Tom overcome his addiction to social media, and Ben and April suspect that the candidate they work for is a robot.

Ben's parents ruin Leslie and Ben's engagement party, Chris becomes sad over their engagement, and Tom prepares a new business pitch for Ron.

Leslie and April clash over a proposed dog park, Ben receives a slew of job offers, and Andy uses his detective skills to find out who stole his computer.

Leslie wants to reject a great park idea just because the designer comes from Eagleton, Tom begins his new business venture with a new fiscal approach, and Andy and April find a way to make Andy's new security job more exciting.

Tammy shows up at an awards ceremony to sabotage Ron's new relationship, and four of Jerry's co-workers are shocked that he's throwing a Christmas party without them.

Leslie's bachelorette party is ruined after councilman Jamm backs out of a promise, and Chris throws Ben a bachelor party that everyone will remember.

Leslie and April volunteer to work on a garbage truck to fight sexism in city government, Ron has a frightening experience babysitting Diane's girls, and Andy and Ben try to teach basketball to Tom.

Ann wants to find a sperm donor, Chris, Ron, and Tom help Ben find a wedding caterer, and April replaces Leslie at a public hearing about a new park.

The department has to put together an last-minute fund-raising gala for the new park without Leslie, who has been called away on an emergency disaster drill. Meanwhile, Andy takes his police officer exam.

The clock is ticking -- Leslie and Ben have two hours to complete a years-long project. Meanwhile, Ron gets in trouble when his temper gets the best of him.

Leslie discovers that a newspaper reporter has hacked her e-mail account, Ben begins his new job, and Ann decides that she wants Chris to be her sperm donor.

Leslie devises a bailout plan for Ricky's Records, home to Pawnee's children's music scene. Meanwhile, Ron speaks out against her pro-government plans. Ann promises to write April's recommendation letter only if they become best friends.

Ben and Leslie go to Ben's hometown in Minnesota so he can get the key to the city, an honor given to all former mayors of the town except Ben, councilman Jamm sues Ron for punching him, and Chris and Ann try to test their compatibility.

Leslie faces a roadblock while searching for a new head of Animal Control, Ann convinces Ron to go see a doctor, and Ben asks local fragrance mogul Dennis Feinstein for a charitable donation.

A concerned citizen fights Leslie's efforts to remove some outdated Pawnee laws, and April and Ron are forced to take Chris's management training course.

Leslie throws a last-minute retirement party for Jerry, Tom discovers that he's the new Jerry in the office, and Ann and Chris weigh their options for conception.

After a bill to fund a local putt-putt course is introduced, Leslie and Ron compete for Jamm's swing vote. Meanwhile, Andy decides to retire from the band, and Ann tries to help Tom break up with Mona-Lisa.

A group of citizens organizes a Leslie Knope recall, Andy finds a positive pregnancy test outside Ron's cabin, and Tom considers a lucrative offer to sell Rent-a-Swag.