In trying to uncover the song that turns Rebecca's "knees to butter", Sam asks her mother, who tells Sam that her favorite song was "You've Lost That Loving Feeling" by the Righteous Brothers. Sam later enters Rebecca's office with a tape player playing the song to tempt her; when the episode originally aired, the song was "You've Lost That Loving Feeling," but in the show's reruns in syndication and on home video (including DVD and streaming), the song is a different Righteous Brothers hit, "Unchained Melody." This is presumably due to licensing issues; there are several other "Cheers" episodes whose soundtracks have similar substitutions, although none with a different song by the same artist, and none in which the song title was mentioned in the show's dialogue.