S3, E12: When the neighboring city of Eagleton puts up a fence around one of their parks, Leslie (Amy Poehler) must get her former best friend (guest star Parker Posey) to take it down. Meanwhile, Ron (Nick Offerman) tries to stop Leslie from planning a birthday party for him. Rashida Jones, Aziz Ansari, Chris Pratt, Aubrey Plaza, Adam Scott, Jim O’Heir, Retta and Rob Lowe also star.