Revealing mistake: When April is searching for Donna Meagle on "iGoogle" you can see that it is a HTML document that they've most likely made themselves. The URL says "C:\User\pnr\Desktop\igoogle\igoogle search\donna.HTML". You can also see that the internet browser says "Google Search" but they've used "iGoogle" everywhere else. (00:04:30)
Parks and Recreation (2009)
1 revealing mistake in season 2 - chronological order
Starring: Chris Pratt, Amy Poehler, Aubrey Plaza, Nick Offerman
Genres: Comedy
Factual error: Leslie mentions that Eagleton is "2 towns over." We in later episodes see the border wall between them (S3E12), indicating they're right next to each other.