S4, E1: Leslie (Amy Poehler) has to either break-up with Ben (Adam Scott) or follow her dream of running for office. Ann (Rashida Jones) is forced to dispense medical advice after making an unexpected diagnosis. Meanwhile, Ron (Nick Offerman) prepares for the return of his first ex-wife, Tammy One (guest star Patricia Clarkson). Aziz Ansari, Chris Pratt, Aubrey Plaza, Jim O’Heir, Retta and Rob Lowe also star.