In this episode, Leslie Knope and Ann Perkins sit on a green bench to talk about Ann's future decisions on moving to Michigan in Leslie's office. This green bench is the same bench that Mark and Leslie sat on in season 1 to talk about the future of the pit.
June Diane Raphael, who plays Tynnyfer, is married in real life to actor and comedian Paul Scheer. Scheer also appears on Parks & Rec as the mysterious prankster behind the Kaboom initiative in Kaboom (2009). They also appear, along with Chris Pratt, in Bride Wars (2009).
June Diane Raphael and Sam Elliott later both starred on the Netflix show Grace and Frankie (2015). Raphael playing Grace's daughter and Elliot playing Grace's love interest.
The German word "doppelgänger" (literal translation: double-goer) is the look-alike of a living person.
Ron is revealed to be either a Taurus or a Capricorn according to Cool Ron's remark. (I'm betting Capricorn.)