"Thomas Von Essen, New York City's Thirtieth Fire Commissioner, had seen just about everything during his thirty-one-year career in the fire department: building collapses, raging infernos, heroic rescues, and power struggles. But nothing could have prepared him, or the fire department, for the devastation that occurred on September 11, 2001. In just 102 minutes, the mighty twin towers were reduced to rubble, and the Fire Department of New York had...

The study group returns to find a new vice dean, and Jeff clashes with the new biology professor at Greendale Community College.

The citizens of Pawnee loathe their merger with the neighboring town of Eagleton, and blame all their troubles, both real and imagined, on Councilwoman Knope. The personal lives of those in City Hall are equally as tumultuous: Andy must temporarily say "cheerio" to his wife, April, when he takes a dream job in London; Ron, adjusts to his new domestic roles; and Ann and Chris eagerly await the birth of their child ... if they can survive the woes of...