Once Upon a Time/Operation Mongoose (1)

Operation Mongoose: Part 1
Season 4, Episode 21
Airdate	May 10, 2015
Production Number	421
Written by	Edward Kitsis & Adam Horowitz
Directed by	Romeo Tirone
Stream
← 4x20 Mother	4x22 → Operation Mongoose (2)
Once Upon a Time — Season Four

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Operation Mongoose: Part 1 is the twenty-first episode of the fourth season of Once Upon a Time and the eighty-seventh episode overall.

Starring: Ginnifer Goodwin (Snow White / Mary Margaret Blanchard), Jennifer Morrison (Emma Swan), Lana Parrilla (The Evil Queen / Regina Mills), Josh Dallas (Prince Charming / David Nolan), Emilie de Ravin (Belle), Colin O'Donoghue (Captain Hook), Jared S. Gilmore (Henry Mills), Michael Socha (Knave of Hearts / Will Scarlet)

and Robert Carlyle (Rumplestiltskin / Mr. Gold)

Guest Starring: Lee Arenberg (Grumpy), Eion Bailey (August Booth), Patrick Fischler (Isaac), Rebecca Mader (Zelena), Sean Maguire (Robin), Keegan Connor Tracy (Mother Superior), Timothy Webber (The Apprentice)

Co-Starring: Sean Campbell (Middle Aged Man), Michael Coleman (Happy), Paralee Cook (Middle Aged Woman), Faustino Di Bauda (Sleepy / Walter), David-Paul Grove (Doc), Sarah Ann Hayward (Villager), Jeffrey Kaiser (Dopey), Gabe Khouth (Sneezy), Mig Macario (Bashful), Mandie Vredgoor (Fan), Alison Wandzura (Hostess), Benjamin Wilkinson (Hank)

Plot Overview

The Author proves to be a formidable wild card and forges an alliance with Gold. Emma, her parents, Hook and Regina scramble to stop them, but when Gold and the Author turn the tables on heroes and villains alike, the prospect of any happy outcome appears worlds away. Henry discovers he has big shoes to fill as he steps up to save his family before the story's final page is turned. It's a race to the finish, and everything culminates with a shocking twist that will leave the residents of Storybrooke reeling.

Viewership

• Viewers: 5.51 million
• 18-49 Rating: 1.8%