Parks and Recreation has been killing it with the guest-stars this season, and it looks like they're definitely intending on keeping the trend: According to Vulture, the NBC series has just enlisted Young Adult star Patton Oswalt to appear in an upcoming episode as a "history enthusiast who thinks life was better back in the 1800s, when Pawnee's town charter was created." He is also meant to be an annoyance to Leslie, when she tries to make some changes to the town's guiding documents. 

Showrunner Mike Schur apparently confirmed the news of Oswalt's guest appearance during a conference call today. 

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[via Vulture]

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