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Season Four

"Never give up on the people you love."

"What makes a Hero or a Villain?"

Seasonal Information
No. of Episodes: 22 (23 hours)
First Aired: September 28, 2014 - May 10, 2015
Premiere: "A Tale of Two Sisters"
Finale: "Operation Mongoose Part 2"
Season Chronology
Previous Season: Season Three
Next Season: Season Five

Season Four is the fourth season of ABC's Once Upon a Time. It was announced on May 8, 2014.[1] Filming began on July 9, 2014 and lasted until April 2, 2015.[2]

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

Season Four's DVD/Blu-ray set was released on August 18, 2015.

New Characters


Returning Cast Members


Guest Starring



New Cast Members


Guest Starring

Lineup Changes



Air Dates

  • United States: September 28, 2014 - May 10, 2015
  • Italy: January 2, 2015 - July 28, 2015
  • United Kingdom: March 14, 2015 - May 13, 2015
  • Switzerland: November 6, 2015 - November 24, 2015
  • Belgium: December 5, 2015 - February 13, 2016
  • France: January 7, 2016 - February 18, 2016


  • Michael Socha reprises his role of Will Scarlet from Once Upon a Time in Wonderland.
  • Colin O'Donoghue, Ginnifer Goodwin, Jennifer Morrison, Josh Dallas and Lana Parrilla are the only starring cast members to appear in every episode this season.
  • Adam Horowitz and Edward Kitsis consider this season to have 23 episodes. This is because of a double-length episode that initially aired as episode 8 during this season was later split into episodes 8 and 9 for later release.[25]
  • The storyline featuring the Frozen characters are not considered canon in regards to Frozen 2. Jennifer Lee, who wrote the screenplay for the sequel, notes "No, that’s not canon. We didn’t see it. So I kinda made a point of certain things not to see so it wouldn’t affect us that way. Frozen 1 and Frozen 2 to me are one complete story and that’s really where we stay. So glad they had fun with that. I think they had a lot of fun with the characters."[26]


  1. https://twitter.com/AdamHorowitzLA/statuses/464582544592470018
  2. https://twitter.com/katmtan/statuses/475859762064551936
  3. LISTINGS: ONCE UPON A TIME: Air Date: Sunday, September 25, 2016. Time Slot: 8:00 PM-9:00 PM EST on ABC. Episode Title: (#601) "The Savior".. The Futon Critic. “Guest starring are [...] Peter Marcin as Chief”
  4. http://tvbythenumbers.zap2it.com/2014/09/30/sunday-final-ratings-once-upon-a-time-resurrection-csi-adjusted-down/308631/
  5. http://tvbythenumbers.zap2it.com/2014/10/07/sunday-final-ratings-once-upon-a-time-resurrection-madam-secretary-adjusted-down/311599/
  6. http://tvbythenumbers.zap2it.com/2014/10/14/sunday-final-ratings-once-upon-a-time-brooklyn-nine-nine-madam-secretary-adjusted-down/314089/
  7. http://tvbythenumbers.zap2it.com/2014/10/21/sunday-final-ratings-the-simpsons-mulaney-adjusted-down/317481/
  8. http://tvbythenumbers.zap2it.com/2014/10/28/sunday-final-ratings-once-upon-a-time-60-minutes-adjusted-down-final-spots-numbers/319907/
  9. http://tvbythenumbers.zap2it.com/2014/11/04/sunday-final-ratings-the-good-wife-brooklyn-nine-nine-once-upon-a-time-60-minutes-adjusted-up-final-football-ratings/323716/
  10. http://tvbythenumbers.zap2it.com/2014/11/11/sunday-final-ratings-the-simpsons-brooklyn-nine-nine-adjusted-up/
  11. http://tvbythenumbers.zap2it.com/2014/11/18/sunday-final-ratings-the-simpsons-americas-funniest-home-videos-adjusted-up-final-football-numbers/328882/
  12. http://tvbythenumbers.zap2it.com/2014/12/03/sunday-final-ratings-americas-funniest-home-videos-resurrection-once-upon-a-time-adjusted-up/334461/
  13. http://tvbythenumbers.zap2it.com/2014/12/09/sunday-final-ratings-the-simpsons-family-guy-adjusted-up-60-minutes-adjusted-down-final-football-numbers/337039/
  14. http://tvbythenumbers.zap2it.com/2014/12/16/sunday-final-ratings-bobs-burgers-adjusted-up-60-minutes-adjusted-down-final-football-ratings/339851/
  15. http://tvbythenumbers.zap2it.com/2015/03/03/sunday-final-ratings-the-last-man-on-earth-dateline-adjusted-up/369595/
  16. http://tvbythenumbers.zap2it.com/2015/03/10/sunday-final-ratings-the-last-man-on-earth-bobs-burgers-family-guy-brooklyn-nine-nine-revenge-adjusted-up/373065/
  17. http://tvbythenumbers.zap2it.com/2015/03/17/sunday-final-ratings-the-last-man-on-earth-secrets-lies-battle-creek-60-minutes-adjusted-up/375679/
  18. http://tvbythenumbers.zap2it.com/2015/03/24/sunday-final-ratings-the-last-man-on-earth-60-minutes-adjusted-down/378747/
  19. http://tvbythenumbers.zap2it.com/2015/03/31/sunday-final-ratings-madam-secretary-the-good-wife-60-minutes-adjusted-down/381933/
  20. http://tvbythenumbers.zap2it.com/2015/04/14/sunday-final-ratings-americas-funniest-home-videos-adjusted-up-mad-secretary-the-good-wife-60-minutes-adjusted-down/388684/
  21. http://tvbythenumbers.zap2it.com/2015/04/21/sunday-final-ratings-once-upon-a-time-secrets-acm-awards-american-odyssey-adjusted-down/392401/
  22. http://tvbythenumbers.zap2it.com/2015/04/28/sunday-final-ratings-family-guy-adjusted-up-no-adjustments-to-once-upon-a-time/395350/
  23. http://tvbythenumbers.zap2it.com/2015/05/05/sunday-final-ratings-family-guy-secrets-and-lies-adjusted-up/399471/
  24. 24.0 24.1 http://tvbythenumbers.zap2it.com/2015/05/12/sunday-final-ratings-once-upon-a-time-rooklyn-nine-nine-adjusted-up/402844/
  25. https://twitter.com/AdamHorowitzLA/status/561963686311391234
  26. Marshall, Andrew (September 30, 2019). Frozen 2: Once Upon A Time's Frozen Season Isn't Canon. Screen Rant. “"No, that’s not canon. We didn’t see it. So I kinda made a point of certain things not to see so it wouldn’t affect us that way. Frozen 1 and Frozen 2 to me are one complete story and that's really where we stay. So glad they had fun with that. I think they had a lot of fun with the characters."”