According to Nielsen Media Research, "Greg Pikitis" was seen by 4.96 million household viewers, only a slight drop from the previous week despite direct competition from the 2009 World Series.
Leslie warns Greg she knows he vandalizes the town's statue of Mayor Percy every Halloween, but that she will be watching him closely and will catch him this year.
That night, Leslie watches Greg with the help of her boyfriend, Pawnee police officer Dave Sanderson, while Andy, who now has a part-time job with the parks department, guards the statue.
Later, Andy helps Leslie clean the parks office and, after a few beers, they decide to toilet paper Greg's house.
The episode ends with a flashback showing Greg sneaking into the department disguised as a janitor, hiding in a dumpster until everybody leaves, then vandalizing the office.
[1] The episode featured a guest performance by stand-up comedian Louis C.K., who reprises his recurring role as Dave Sanderson, Leslie's police officer boyfriend.
[3] Within a week of the episode's original broadcast, two deleted scenes from "Greg Pikitis" were made available on the official Parks and Recreation website.
In the second 75-second clip, Jerry nearly passes out from dehydration in his oversized Halloween dragon costume, and Leslie arrives late to the party dressed as a nurse.
[7] In its original American broadcast on October 29, 2009, "Greg Pikitis" was seen by 4.96 million household viewers, according to Nielsen Media Research.
He particularly praised Louis CK and some of the smaller jokes in the episode, like the fact that a gay character's "straight guy" Halloween costume is identical to Mark's regular wardrobe.
[6] Time magazine critic James Poniewozik said it was a "strong episode that hit office and personal sides of the characters equally well".
Linda Stasi of New York Post said the episode was "a big yawn", although she praised the performance of Cody Klop as Greg Pikitis.
[3] During a brainstorming session among the Parks and Recreation writers prior to season four, screenwriter Chelsea Peretti proposed bringing the Greg Pikitis character back for a future episode.
"Greg Pikitis", along with the other 23 second season episodes of Parks and Recreation, was released on a four-disc DVD set in the United States on November 30, 2010.