Paul Rudd guest starrs as Bobby Newport, Leslie's biggest competitor in the race for City Council. Fortunately, he was an absolute idiot who was only running because his father told him to, which was made abundantly clear during the big debate.
Ann throws a Halloween party, which starts out embarrsingly boring until Tom (dressed as rapper T-Pain), comes to liven it up. During the party, Ann's nurse pals try and seduce her boyfriend Mark in an effort to "test" his loyalty.
Leslie's boyfriend and campaign manager Ben punches Derek at a bowling event after he calls Leslie a nasty word. Leslie, flattered by his defense, kisses Ben while Derek lies on the floor bleeding.
Leslie goes on a date with an MRI technologist, played by Will Arnett, Poehler's then real-life husband. And yes, she does get an MRI scan during the date.
Leslie's ex-boyfriend Dave (Louis C.K.) handcuffs Ben to a urnial in an effort to win her back.
Jean-Ralphio rules Pawnee with raps.
Leslie's tour bus crashes a memorial service for Nick Newport Sr., her City Council opponent's father.
Ron and Tammy (Nick Offerman's real-life wife Megan Mullally) get re-married after a drunken night of mischief, only to divorce again by the end of the episode.
Leslie gets drunk before being interviewed by famous news journalist Buddy Wood, played by Sean Hayes.
Leslie's team tries (and fails) to cross the ice to get to her stage during a campaign event.
Ron gets shot in the back of the head after inviting girls on his annual hunting trip that's supposed to be men only.
Andy and April throw a Halloween party without telling their roommate, Ben.
NEXT GALLERY: 10 Best Outfits Ever Worn to the Emmys