The fourth season of Parks and Recreation originally aired in the United States on the NBC television network, and began on September 22, 2011, and ended on May 8, 2012. The season contained 22 episodes. It stars Amy Poehler, Rashida Jones, Aziz Ansari, Nick Offerman, Aubrey Plaza, Chris Pratt, Adam Scott, and Rob Lowe, with supporting performances from Jim O'Heir and Retta. As with past seasons, it focuses on Leslie Knope (Amy Poehler) and her staff at the parks and recreation department of the fictional Indiana town of Pawnee. However, this season features an overarching story arc, beginning in the first episode and culminating in the finale, where Leslie runs for the city council of Pawnee. From Wikipedia
