The Song in Your Heart

"The Song in Your Heart" is the twentieth episode of Season Six of ABC's Once Upon a Time. It was written by David H. Goodman & Andrew Chambliss, and directed by Ron Underwood. It will be the one hundredth and thirty-first episode of the series overall, and will premiere on May 7, 2017.

This is the first, and so far only, musical episode of the series. The songs were written by Alan Zachary and Michael Weiner.

Synopsis
In flashback, Snow and Charming make a special wish that Emma will be protected. The result of their wish has the whole kingdom bursting into song which infuriates the Evil Queen. Meanwhile in Storybrooke, the Black Fairy announces her plans to unleash another curse on the town while Emma and Hook prepare for their wedding.

Starring

 * Ginnifer Goodwin as Snow White/Mary Margaret Blanchard
 * Jennifer Morrison as Emma Swan
 * Lana Parrilla as Evil Queen/Regina Mills
 * Josh Dallas as Prince Charming/David Nolan
 * Emilie de Ravin as Belle/Belle French
 * Colin O'Donoghue as Hook
 * Jared S. Gilmore as Henry Mills
 * Rebecca Mader as Zelena
 * Robert Carlyle as Rumplestiltskin/Mr. Gold

Guest Starring

 * Lee Arenberg as Grumpy/Leroy
 * Tony Amendola as Geppetto/Marco
 * Keegan Connor Tracy as Blue Fairy/Mother Superior
 * Raphael Sbarge as Jiminy Cricket/Archie Hopper
 * Beverley Elliott as Granny/Granny
 * David Avalon as Doc/Doc
 * Gabe Khouth as Sneezy/Mr. Clark
 * Faustino di Bauda as Sleepy/Walter
 * Michael Coleman as Happy/Happy
 * Mig Macario as Bashful/Bashful
 * Giancarlo Esposito as Magic Mirror/Sidney Glass
 * Christopher Gauthier as William Smee
 * Jaime Murray as Black Fairy
 * Jakob Davies as Young Pinocchio
 * Mckenna Grace as Young Emma
 * Ari Guzhel as Older Girl

Songs
The episode will feature a total of eight songs:

Trivia

 * -|Production Notes=

Production Notes

 * The title of this episode was revealed by Adam Horowitz via his Twitter account on February 21, 2017.
 * The episode was also referred to as "The Musical Episode", as it was revealed by choreographer Paul Becker via his Instagram account on February 9, 2017.
 * According to Jane Espenson, a musical special feature was already considered back in 2014, but it did not happen because it was too expensive.
 * This episode has been in the works since Summer 2016.
 * At the origin, the episode was supposed to feature seven songs, but one track ended up being split in two songs: "The Queen Sings" and "Love Doesn't Stand a Chance".
 * Songs were recorded in advance, and then played back on set as the actors choreographed.
 * According to Adam Horowitz, it was hard to figure out how to meld the "voice" of the show with a musical.
 * On the last day of filming for this episode, Colin O'Donoghue injured himself and fractured his foot.
 * Several mistakes were made on the press release of this episode:
 * Jakob Davies is mistakenly credited as "Jack Davies".
 * Sidney Glass' name is misspelled as "Sydney".
 * -|Set Notes=

Props Notes

 * Happy's dwarf nose and ears were later put up for auction on E-Bay by the charity organization Bullies Keep Out.

Costume Notes

 * Emma's wedding dress is strongly inspired by the one worn by Grace Kelly during her wedding with Rainier III of Monaco.
 * Jennifer Morrison explained that the dress "represents the elegance and simplicity of classic timeless strength mixed with the delicacy of femininity and vulnerability".
 * Hook wears a black velvet jacket for the wedding, which was Edward Kitsis' idea. The wedding outfit was originally going to be different, but Edward Kitsis and Adam Horowitz thought that Hook needed to have a tuxedo that reflected his personality and had a little edge to it. The velvet felt like "the Hook-version of fancy". Actor Colin O'Donoghue "wanted everything to feel like one of those old black-and-white musicals", and the wedding outfit is a combination of this idea and the velvet.