Season Four

Season Four is the fourth season of ABC's Once Upon a Time. It was announced on May 8, 2014. Filming began on July 9, 2014 and is scheduled to end on April 2, 2015.

Season Four premiered on September 28, 2014 with "A Tale of Two Sisters", and will end with "Operation Mongoose Part 1" immediately followed by "Operation Mongoose Part 2" on May 10, 2015.

Potential Storyline Information
The following will be addressed/featured: The following might be addressed/featured:
 * The search for the author leading Operation Mongoose outside of Storybrooke.
 * More fallout as a result of Emma Swan and Hook messing with the past.
 * The Queens of Darkness origin stories
 * Ursula-centric episode is "Poor Unfortunate Soul"
 * Cruella-centric episode is "Sympathy for the De Vil"
 * Why Cruella and Ursula didn't end up in Storybrooke.
 * Will Scarlet's play in the big picture of the story, and some of his backstory
 * Hook's past with Ursula
 * More of Storybrooke before Emma arrived and broke the curse.
 * Robin Hood's first background episode
 * Why Robin Hood looked different in "Lacey"
 * How Robin Hood and Will Scarlet met
 * Some new worlds and some old worlds
 * Oz
 * Pongo's lineage
 * Why Prince Charming and Snow White don't seem to know much about the Dark Curse in "Pilot" when they actually learned about it earlier, as seen in "Unforgiven".
 * The spin-off's Red Queen
 * Tinker Bell
 * Ruby
 * Lumiere
 * A major character's death
 * The Swan family and the reason why they gave up Emma

New Characters

 * Anna
 * Gerda
 * Grand Pabbie
 * Kristoff
 * Sven
 * Bo Peep/Bo Peep
 * Ingrid
 * Hans
 * Will Scarlet
 * The Apprentice/The Apprentice
 * Lily
 * Colette
 * Duke
 * Helga
 * Cruella De Vil


 * King Stefan
 * Poseidon
 * Gorin
 * The Sorcerer
 * Autumn
 * Author

Recast Characters
Tiffany Boone as young Ursula
 * Merrin Dungey as Ursula

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
 * Robert Carlyle as Rumplestiltskin/Mr. Gold

Guest Starring

 * Lee Arenberg as Grumpy/Leroy
 * Christie Laing as Marian
 * Sean Maguire as Robin Hood/Robin Hood
 * Giancarlo Esposito as Magic Mirror/Sidney Glass
 * Beverley Elliott as Granny/Granny
 * Gabrielle Rose as Ruth
 * Raphael Sbarge as Jiminy Cricket/Archie Hopper
 * Brad Dourif as Zoso
 * Abby Ross as young Emma
 * Sarah Bolger as Aurora
 * Jessy Schram as Cinderella/Ashley Boyd


 * Keegan Connor Tracy as Blue Fairy/Mother Superior
 * Charles Mesure as Black Beard
 * Kristin Bauer van Straten as Maleficent/Maleficent
 * Tony Amendola as Geppetto/Marco
 * Jakob Davies as Pinocchio
 * Eion Bailey as August Booth
 * JoAnna Garcia Swisher as Ariel
 * Christopher Gauthier as William Smee/William Smee
 * Wil Traval as Sheriff/Keith
 * Rebecca Mader as Wicked Witch of the West/Zelena
 * Barbara Hershey as Cora

Co-Starring

 * Raphael Alejandro as Roland/Roland
 * Faustino Di Bauda as Sleepy/Walter
 * Jason Burkart as Little John/Little John
 * Michael Coleman as Happy/Happy
 * Eric Keenleyside as Maurice/Moe French
 * David-Paul Grove as Doc/Doc
 * Gabe Khouth as Sneezy/Mr. Clark
 * Jeffrey Kaiser as Dopey/Dopey
 * Mig Macario as Bashful/Bashful

Starring

 * Michael Socha as Knave of Hearts/Will Scarlet

Guest Starring

 * Georgina Haig as Elsa
 * Pascale Hutton as Gerda
 * Elizabeth Lail as Anna
 * Scott Michael Foster as Kristoff
 * John Rhys-Davies as Grand Pabbie
 * Elizabeth Mitchell as Ingrid
 * Robin Weigert as Bo Peep/Bo Peep
 * Tyler Jacob Moore as Hans
 * Timothy Webber as The Apprentice/The Apprentice
 * Nicole Munoz as Lily
 * Frances O'Connor as Colette
 * Sally Pressman as Helga
 * Jonathan Runyon as Duke
 * Merrin Dungey as Ursula
 * Victoria Smurfit as Cruella De Vil
 * Sebastian Roché as King Stefan
 * Ernie Hudson as Poseidon
 * Patrick Fischler as Gorin
 * Agnes Bruckner as Unknown
 * Unknown as Autumn
 * Unknown as The Sorcerer
 * Unknown as Author

Lineup Changes

 * Michael Raymond-James is no longer billed as "Starring".
 * Christie Laing is now billed as "guest starring".
 * Abby Ross is now billed as "guest starring".