The Umbrellas of Cherbourg
According to the DVD commentary, the last part of the episode where Seymour is waiting outside on the sidewalk was originally set to "Gayane's Adagio" from Aram Khachaturian's "Gayane" ballet suite, famously used in the sequence introducing the "Discovery" spacecraft in "", but was replaced with the song "I Will Wait for You" from "The Umbrellas of Cherbourg" as sung by Connie Francis, which writer Eric Kaplan's grandparents sang and played on the piano while he was a child. The song "Everybody's Talkin'" by Harry Nilsson is also featured in this episode.