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 (6/6)
 * Jennifer Morrison - Emma Swan (6/6)
 * Lana Parrilla - Regina Mills/Queen Regina (6/6)
 * Josh Dallas - David Nolan/Prince Charming (6/6)
 * Emilie de Ravin - Belle (6/6)
 * Colin O'Donoghue - Captain Hook (6/6)
 * Jared S. Gilmore - Henry Mills (5/6)
 * Michael Socha - Will Scarlet (3/6)
 * and Robert Carlyle - Mr. Gold/Rumplestiltskin (5/6)

Recurring Guest Stars

 * Georgina Haig - Elsa (6/6)
 * Elizabeth Lail - Anna (5/6)
 * Elizabeth Mitchell - Queen Ingrid (5/6)
 * Lee Arenberg - Leroy/Grumpy (3/6)
 * Sean Maguire - Robin Hood (3/6)
 * Raphael Alejandro - Roland (2/6)
 * Beverley Elliott - Granny (2/6)
 * Giancarlo Esposito - Sidney Glass/Magic Mirror (2/6)
 * Christie Laing - Marian (2/6)
 * Jason Burkart - Little John (1/6)
 * Michael Coleman - Happy (1/6)
 * Faustino Di Bauda - Walter/Sleepy (1/6)
 * Raphael Sbarge - Archie Hopper/Jiminy Cricket (1/6)

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, former star of Once Upon a Time in Wonderland, Michael Socha (Will Scarlet), is promoted to a series regular.
 * 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.