High Quality Content by WIKIPEDIA articles! Telethon is the 22nd episode of the second season of the American comedy television series Parks and Recreation, and the 28th overall episode of the series. It originally aired on NBC in the United States on May 6, 2010. In the episode, Leslie volunteers to host a charity telethon and is given the unappealing 2 a.m. to 6 a.m. shift.