Season 4

This article contains episode summaries for the fourth season of Once Upon a Time.

Overview
The Storybrooke residents do not know what Elsa has in store for them. Back in the past, in Elsa's kingdom of Arendelle, we will discover what happened to her, her sister Anna and Kristoff, and how and why Elsa became a prisoner of Rumplestiltskin. And now that Emma has brought back Robin Hood's wife, Marian, and possibly sparked the end of Regina's relationship with him, will she return to her old, evil ways and do everything in her power to get even? As the season continues, new fairy tale characters will be revealed and old acquaintances will be revisited. But not everyone can be trusted.

Starring

 * Ginnifer Goodwin - Mary Margaret Blanchard/Snow White (23/23)
 * Jennifer Morrison - Emma Swan (23/23)
 * Lana Parrilla - Regina Mills/Queen Regina (23/23)
 * Josh Dallas - David Nolan/Prince Charming (23/23)
 * Emilie de Ravin - Belle Gold/Belle (18/23)
 * Colin O'Donoghue - Killian Jones/Captain Hook (23/23)
 * Jared S. Gilmore - Henry Mills (22/23)
 * Michael Socha - Will Scarlet (15/23)
 * and Robert Carlyle - Mr. Gold/Rumplestiltskin (22/23)

Recurring Guest Stars
1 Not credited in 4.20.
 * Sean Maguire - Robin Hood (14/23)
 * Georgina Haig - Elsa (12/23)
 * Elizabeth Lail - Anna (10/23)
 * Elizabeth Mitchell - Ingrid (10/23)
 * Kristin Bauer van Straten - Maleficent (9/23)
 * Scott Michael Foster - Kristoff (9/23)
 * Lee Arenberg - Leroy/Grumpy (7/23)
 * Beverley Elliott - Granny (7/23) 1
 * Patrick Fischler - Isaac Heller (7/23)
 * Victoria Smurfit - Cruella De Vil (7/23)
 * Timothy Webber - Sorcerer's Apprentice (7/23) 2
 * Merrin Dungey - Ursula (6/23)
 * Raphael Alejandro - Roland (5/23)
 * Faustino Di Bauda - Walter/Sleepy (5/23)
 * Christie Laing - Marian (5/23)
 * Rebecca Mader - Zelena (5/23)
 * Eion Bailey - August W. Booth/Pinocchio (4/23)
 * Abby Ross - Young Emma (4/23)
 * Keegan Connor Tracy - Mother Superior/Blue Fairy (4/23)
 * Jason Burkart - Little John (3/23)
 * Michael Coleman - Happy (3/23)
 * David-Paul Grove - Doc (3/23)
 * Gabe Khouth - Mr. Clark/Sneezy (3/23)
 * Jeffrey Kaiser - Dopey (3/23)
 * Mig Macario - Bashful (3/23)
 * Tony Amendola - Marco/Geppetto (2/23)
 * Sarah Bolger - Aurora (2/23)
 * Jakob Davies - Young Pinocchio (2/23)
 * Giancarlo Esposito - Sidney Glass/Magic Mirror (2/23)
 * Cinder - Pongo (1/22) 3
 * JoAnna Garcia Swisher - Ariel (1/23)
 * Chris Gauthier - William Smee (1/23)
 * Barbara Hershey - Cora (1/23)
 * Tony Perez - Prince Henry (1/23)
 * Raphael Sbarge - Archie Hopper/Jiminy (1/23)
 * Ingrid Torrance - Severe Nurse (1/23)

2 Appears in archive footage in 4.10, accounting for an 8th appearance.

3 Not credited.

Trivia

 * The entire main cast from the third season returns with star billing with the sole exception of Michael Raymond-James (Neal Cassidy/Baelfire), due to the character's death in episode 3.15. Additionally, Michael Socha (Will Scarlet), former star of Once Upon a Time in Wonderland, joins the regular cast.
 * This is the only season of the main series to feature Socha as a series regular.
 * Goodwin, Morrison, Parilla, Dallas, and O'Donoghue are the only actors to be featured in every episode this season.
 * Due to the Frozen theme of the season's first 11 episodes, all of their title cards feature the respective subject amidst a snowstorm.

Gallery
Gallery of photographic posters released to promote the season.