Leslie and Ben clash while working on her first campaign ad. Elsewhere, Chris tries to befriend Ron, making Ron very uncomfortable, while April and Andy take a trip to the doctor.

Leslie causes a spectacle to draw attention to an important cause. Meanwhile, Andy and April adopt a pet, and Ben takes up a new hobby

Frustrated by how hard it is to get things done from inside the Parks Dept., Leslie forms a citizen action group and fights from the outside. Meanwhile, everyone in the office tries to come up with the perfect Christmas gift for Leslie

Leslie hosts a Model United Nations at a Pawnee high school; Ron searches for a replacement for Tom; Chris seeks Ann’s advice on love after a date cancels on him

Andy and April host a Halloween bash at their house; Tom emcees an event for Leslie’s campaign; Andy and April receive an unusual wedding present from Ron and Ann.

Ron takes his boys-only troop of Pawnee Rangers into the wild. Not wanting the girls to feel left out, Leslie also takes her troop of Pawnee Goddesses on an adventure weekend. Meanwhile, a reluctant Ben joins Tom and Donna for a day of relaxation, and Chris spends some time with Jerry

Leslie’s book about Pawnee comes out just in time for her campaign; Ann tries to bond with Ron and April

Ron’s first ex-wife, Tammy One (Patricia Clarkson), reenters his life and tries to control his every move. Meanwhile, Ben helps Tom balance the books at his new company; and Ann makes a PSA, with help from Chris. Megan Mullaly also guest stars.

While Ron is busy with the return of Tammy (the first) Leslie must make certain decisions regarding her relationship with Ben and her political career.