Claire has overdone it in Halloweens past and the neighbors definitely don't share her enthusiasm, so this year she's being forced to tone it down and keep it kid friendly.
Leslie and the department get caught in a overblown mini-scandal, Tom falls for a visiting doctor, and Ben tries to help Ron draw up a "real" will.
Jess panics when her sister, Abby, decides to stay in Los Angeles and sets her eyes on one of the loftmates. Meanwhile, Winston procrastinates about checking his test results for the LAPD entrance exam.
On the night before Donna and Joe's wedding, Ben receives an offer to run for Congress and Ron causes a problem for Tom's new relationship.
Before bidding Pawnee farewell, the gang must complete one last task together: repairing a broken swingset on a playground.
