"Once More, with Feeling" is the seventh episode of the sixth season of the American supernatural drama television series Buffy the Vampire Slayer (1997–2003), and the only one in the series that is a musical. It was written and directed by series creator Joss Whedon and originally aired on UPN in the United States on November 6, 2001.

"Once More, with Feeling" explores changes in the relationships of the main characters, using the plot device that a demon—credited as "Sweet" but unnamed in the episode—compels the people of Sunnydale to break into song at random moments to express hidden truths. The musical format allowed characters to stay true to their natures while they struggled to overcome deceit and miscommunication, fitting with the sixth season's themes of growing up and facing difficulties in adulthood.Kaveney, pp. 13–42.Stafford, p. 24.

All of the regular cast performed their own singing, although two actors requested very little singing. Alyson Hannigan (Willow) requested minimal singing as she was not comfortable with her singing voice. Michelle Trachtenberg (Dawn) asked for a dance number as she felt more comfortable utilizing her ballet background. "Once More, with Feeling" is the most technically complex episode in the series, as extra voice and dance training for the cast (and other actors in the episode) was interspersed with the production of four other Buffy episodes. This was Whedon's first television episode where he wrote music, and different styles — from 1950s sitcom theme music to rock opera — and allowed the characters to express themselves in specific ways. The episode received critical acclaim, particularly for the organic integration of the musical format and its humor and wit. It is considered one of the most effective and popular episodes of the series, and one of the best episodes of television. Prior to a financial dispute in 2007, it was shown in theaters with the audience invited to sing along.

Background Throughout the series Buffy Summers (Sarah Michelle Gellar), in her role as the Vampire Slayer, is assisted by her close friends, who refer to themselves as the "Scooby Gang". These include Xander Harris (Nicholas Brendon), a young man without particular strengths or talents, but devoted to Buffy and her calling, and Willow Rosenberg (Alyson Hannigan), a young woman who has grown from a shy but gifted student into a strong woman and powerful user of magic. They are mentored by Buffy's "Watcher", Rupert Giles (Anthony Stewart Head), a paternal figure since the first season, when Buffy moved to Sunnydale after her parents' divorce. Xander is engaged to Anya Jenkins (Emma Caulfield), a former vengeance demon who has become human. They have struggled with disclosing their engagement to the rest of the group and individually doubt their impending marriage.

Buffy died at the end of the fifth season ("The Gift"), sacrificing herself in place of her younger sister Dawn (Michelle Trachtenberg) in order to save the world. In the first episode of the sixth season, Willow, believing Buffy to be in Hell, used magic to bring her back from the grave. Buffy was in fact at peace, in what she thinks was heaven, but she has kept this a secret from her friends. Since her resurrection, Buffy has been lost and without inspiration to perform her duties as a Slayer. Willow is romantically involved with Tara Maclay (Amber Benson), a powerful but ethical witch. Tara has previously expressed concern at Willow's use of her emergent magical powers for trivial or personal matters. In the preceding episode ("All the Way"), Willow cast a spell to make Tara forget an argument about her abuse of magic. In the same episode, Dawn, who has been stealing from stores, including Anya's magic shop, lies to Buffy and goes on a clandestine and almost deadly date. Left to take care of Dawn after the death of their mother Joyce Summers (Kristine Sutherland) in the fifth season ("The Body"), Buffy has come to depend more heavily on Giles. Following Dawn's date, Buffy asks Giles to shoulder responsibility for disciplining her, much to his discomfort.Stafford, pp. 284–285.

Buffy's former nemesis is Spike (James Marsters), a vampire. In the fourth season The Initiative, a secret military organization whose mission is to evaluate and eliminate demonic beings, rendered Spike harmless by implanting a microchip in his head that causes him intense pain when he attacks humans. However, the chip does not affect him when he harms demons and he now often fights on Buffy's side, after at first fighting just for the pleasure of brawling. His motivations changed when, in the fifth season, Spike realized he had fallen in love with Buffy. She initially rejected him, but just before her death they had begun to form a friendship of sorts. She has been confiding in him; prior to this episode, he is the only one to whom Buffy has revealed that she was in heaven.

Throughout Buffy the Vampire Slayer, music serves as a narrative tool, integral to character development and action. The mood is set by music, characters discuss it, and writers use it to emphasize differences between generations. In an essay on the use of music in the series, Jacqueline Bach writes that in conjunction with the sixth season themes of growing up, "Once More, with Feeling" gives music a central role instead of keeping it in the background.Dial-Driver, et al, pp. 38–50.

Plot When Buffy is on patrol, she laments in song about how uninspired her life has become ("Going Through the Motions"). The next morning at the Magic Box, the gang reveal that they also sang that evening. Led by Giles, the gang theorizes about the cause of the singing; they sense no immediate danger but agree that by working together they can overcome anything ("I've Got a Theory", "Bunnies", and "If We're Together"). Buffy learns that the whole town is affected when she looks outside the shop to see a large group (led by series writer and producer David Fury) singing and dancing about how a dry-cleaning service got their stains out ("The Mustard").

Tara and Willow leave to "research" at home, dally along the way while Tara muses about how much Willow has improved her life ("Under Your Spell"), and continue the song during lovemaking. The next morning, Xander and Anya perform a duet about their secret annoyances with each other and their respective doubts about their impending marriage ("I'll Never Tell"). They realize that the songs are bringing out hidden secrets, and later insist to Giles that something evil is to blame. As they argue, they walk past a woman (series writer and producer Marti Noxon) protesting a parking ticket ("The Parking Ticket"). That evening, Buffy visits Spike, who, on bended knee, pledges himself as Buffy's "willing slave" while at the same time angrily telling her to leave him alone if she will not admit her love for him ("Rest in Peace").

Dawn tells Tara she is glad that Tara and Willow have made up after their argument. Since Tara has no recollection of an argument, she suspects that Willow has used magic to alter her memory. She goes to the Magic Box to consult a book, leaving Dawn alone. Dawn, contemplating a collection of objects that she has stolen, including the charm that summoned Sweet, starts to bemoan that no one seems to notice her ("Dawn's Lament"), but is suddenly seized by a group of minions. They take Dawn to The Bronze, where her attempt to escape transforms into an interpretive dance with them ("Dawn's Ballet") before she meets Sweet (Hinton Battle), a zoot suit-wearing, tap-dancing, singing demon. He tells Dawn that he has come to Sunnydale in response to her "invocation", and he will take her to his dimension to make her his bride when his visit is complete but when Dawn reveals that her sister is the Slayer, he sends his minions to challenge her to rescue Dawn ("What You Feel").

At the Magic Box, Giles recognizes that he must stand aside if Buffy is to face her responsibilities in caring for Dawn instead of relying on him ("Standing") and Tara finds a picture of the Lethe's bramble flower Willow used to cast a spell on her in a book of magic. Giles and Tara separately resolve to leave the people they love, respectively Buffy and Willow — Giles wants to leave Buffy for her own good, while Tara wants to leave Willow because she has become horrified by Willow's magical manipulation of their relationship ("Under Your Spell" and "Standing" (reprise)). When one of Sweet's minions tells Buffy about Sweet holding Dawn at The Bronze, Giles forbids the gang to assist her, so she goes alone, despite having no will to do so; eventually Giles and the Scoobies change their minds and leave to catch up. Although Spike initially thinks that things would be better for him if Buffy was dead, he also changes his mind and decides to help Buffy. Sweet opines that Buffy is drawn to danger ("Walk Through the Fire").

Meeting Sweet at The Bronze, Buffy offers him a deal: she will take her sister's place if she cannot kill him. Sweet asks Buffy what she thinks about life, and she gives a pessimistic take on its meaning ("Something to Sing About"). When the others arrive, Buffy divulges while singing that Willow took her from heaven, and Willow reacts with horror at realizing what she has done. Upon divulging this truth, Buffy gives up on singing and dances so frenetically that she begins to smoke and is on the verge of combusting as Sweet's other victims have been shown to do. Then Spike stops her, telling her that the only way to go forward is to just keep living her life. Xander then reveals that he, not Dawn, invoked Sweet, hoping for a musical "happy ending" for his marriage plans and unaware of the demon's deadly nature. Sweet, after releasing Xander from the obligation to be Sweet's "queen", tells the group how much fun they have been ("What You Feel" (reprise)) and disappears. The Scoobies realize that their relationships have been changed irreversibly by the secrets revealed in their songs ("Where Do We Go from Here?"). Spike leaves The Bronze, but Buffy follows him out, and they kiss ("Coda").

Production and writing

Joss Whedon had wanted to make a musical episode since the start of the series. This desire was heightened during the fifth season when he hosted a Shakespeare reading at his house, to which the cast was invited. They began drinking and singing, demonstrating to Whedon that certain cast members had musical talents. Whedon knew he would have to write an entire score, which would take weeks or months. During the first three seasons of Buffy, he was unable to take more than two weeks off at a time, and the constraints of writing and directing the show precluded him from putting forth the effort of preparing a musical. Whedon spoke to the show's producer, Gareth Davies, about his idea; they agreed that a musical episode would be written.

Whedon spent six months writing the music for "Once More, with Feeling".Stafford, p. 286. When he returned after the end of the fifth season, he presented Davies with a script and CD, complete with notated and orchestrated music, which Davies found "mind-boggling".Fury, David (2008). Buffy the Vampire Slayer: The Complete Sixth Season; David Fury's Behind the Scenes of "Once More, with Feeling". [DVD]. 20th Century Fox. The actors were initially bewildered; in 2012, James Marsters commented that "it's obvious now that they were good songs but the thing was Joss and his wife Kai, they don't sing very well. And they don't play piano very well. The songs sounded really cheesy and horrible... We were saying, 'Joss, you're ruining our careers.'"