Episode: Once More, With Feeling(Buffy, Season 6) "They got the mustard out!" Fantastic news, David! "Once More, With Feeling" was the high point of an otherwise rocky sixth season of Buffy. A musical episode, it relied on the cast's voices, and was the brainchild of series creator Joss Whedon. Possibly one of the most famous musical episodes of any TV series, "Once More, With Feeling" was in short brilliant. There are two singing extras in the show you might not recognize at first glance, but who are well known to fans of Buffy the Vampire Slayer: Writer/producer David Fury, who sings with joy that "they got the mustard out!" of his now-cleaned shirt, and writer/producer Marti Noxon, who bemoans (in song of course) being issued a parking ticket.