After the heroes return to Storybrooke, they try stop Hades from using the Olympian Crystals to take over the town.
Hades turn to the heroes for help after Gold and Peter abduct Zelena, and offers their freedom in return. However, Cruella objects to the heroes leaving without her. In the past, Emma makes an unexpected friendship while looking for her family.moreless
Thanks to Gold's portal spell, the Underworld receives three new visitors. Meanwhile, David and Mary Margaret learn of a way to contact their baby son. In the past, Hades and Zelena ally to gather the ingredients for Zelena's time-travel spell.moreless
After a prisoner escapes from the Underworld prison and brings word of Hook's location to the others, Mary Margaret seeks out an old friend for help. In the past in the Enchanted Forest, a young Snow faces a challenge to her rulership when bandits threaten her people.moreless
The group arrives in the Underworld and finds a dark counterpart to Storybrooke. While Regina deals with her mother--now the mayor of the other-Storybrooke--the others try to find Hook. In the past, Regina's father tries to convince her to turn from the path of vengeance before her soul is forfeit.moreless
The resurrected Dark Ones seek to find living souls that they can sacrifice to guarantee that they remain in the world of the living. However, when Emma sets out to stop them, Dark Hook intervenes. In the past, Regina and Hook make a deal to eliminate each other's demons.moreless
Events in Camelot catch up to the present as Hook becomes the Dark One and seeks revenge on Rumplestiltskin. In the present, Emma tries to turn Hook from his revenge now that he knows he shares the power of the Dark One with Emma.moreless
While Emma tries to prepare Hook for the the truth of what she did in Camelot, Zelena gives birth to her child. In the past at Camelot, Emma must pay a terrible price to free Hook and the others from Arthur and Zelena's captivity.moreless
At the Camelot of six weeks ago, one team tries to recover Excalibur, while another goes after the spark Merlin can use to reforge it. In the distant past, Merlin falls in love with a refugee named Nimue.moreless
In the Camelot of six weeks past, Emma tries to determine how Merlin was trapped in a tree. However, Arthur attempts to thwart Emma once she discovers the ingredient necessary to free the wizard. Meanwhile, Merida trains Gold to be the hero that Emma needs, and Henry asks Violet out for a date.moreless
Six weeks earlier, Mary Margaret is unable to convince David that Arthur poses a threat to them and takes her own steps. In the present, Emma begins a new plan to free Excalibur from the Stone. And in Camelot's past, Guinevere travels with Lancelot into the heart of darkness.moreless
In the Enchanted Forest, Arthur insists on accompanying David to find a magic relic that would let Regina communicate with the imprisoned Merlin. In Storybrooke, Emma needs Hooks help to withdraw Excalibur from the Stone.moreless
In flashback, the Storybrooke residents are welcomed to Camelot but things turn dangerous. In the present, Hook tries to bring Emma back to the light.
Fighting the darkness within her, Emma returns to the Enchanted Forest. Meanwhile, Regina and the others are forced to turn to Zelena for help so that they can follow their friend and aid in her struggle.moreless
Isaac completes his new story, giving the villains happy endings and turning the heroes into villains, thieves, and cowards. Only Henry is unaffected, and must find a way to undo Isaac's spell and restore things to normal.moreless
Henry, Emma, and Hook join forces in Isaac's fictional world to stop the wedding of Zelena and Robin, and reverse Isaac's story. However, Isaac turns to the heroic Rumplestiltskin for help in stopping them, forcing the Light One to make a desperate choice.moreless
Emma takes Lily to Storybrooke to reunite her with Maleficent, while Isaac seeks out a new source of magic ink after Gold's condition worsens. In the past, Cora offers to make amends with Regina for killing her true love, but Regina isn't convinced her mother has her best interests at heart.moreless
Emma and Regina join forces to travel to New York City and both find Lily and rescue Robin. However, things go terribly wrong. In the past, a young Emma has a chance at a happy life with a new family until Lily reenters the picture.moreless
Emma tries to find the Author before Gold does, despite her issues with her parents. In the past, Rumplestiltskin sends Robin to Oz to steal an elixir from the Wicked Witch.
Hook makes a deal with Ursula to find out what Gold is planning. Meanwhile, Regina dreams of a reunion with Robin, and Gold finds out where the door may be hidden. In the past, the circumstances behind how Ursula lost her singing voice are revealed.moreless
After the Snow Queen's spell is broken, Elsa and the others discover that they need an alternate route back to Arendelle. Hook gives them the key but they're unaware that he's under Gold's influence and Gold wants them out of Storybrooke so they can't stop his plan. Meanwhile, Regina and Robin find happiness only to discover that it's fleeting, and Henry finds a vital clue to the location of the author. In the past, the Queens of Darkness--Maleficent, Ursula, and Cruella De Vil--conspire to obtain a powerful magic artifact from Rumplestiltskin.moreless
Rather than hurt her family and friends, Emma seeks out Gold to find a way to remove her magical powers. Meanwhile, Robin asks Will to help him find a way to ensure Regina's happy ending. In the past, Ingrid tries to turn Elsa against Anna but fails, and the sisters try to trap their aunt in the urn.moreless
Emma prepares to remove her powers to protect her loved ones, unaware that Gold plans to trap her in the Sorcerer's Hat. Meanwhile, Robin finds a clue that may provide Regina with her happy ending. In the past, Ingrid turns Anna against Elsa but the results aren't what she expects.moreless
Emma captures and questions the Snow Queen, who uses the opportunity to turn her against her family. Meanwhile, Regina and Robin continue trying to find a way to save Marian, and Henry continues his undercover mission to find out what Gold is hiding. In the past, the mystery behind Ingrid's powers is revealed.moreless
Belle tries to use Gold's dagger to force him to locate the Snow Queen, so that the townspeople can find out her plans and learn why she wiped Emma's memories. In the past, Belle convinces Anna to take her to Grand Pabbie so that she can recover her memories of her mother Colette.moreless
Someone casts a freezing spell on Marian and the townspeople believe that Elsa is responsible... unaware that the Snow Queen is the real perpetrator. Meanwhile, Emma and David meet an old friend of Robin's, while Regina and Henry set out to find the author of Henry's storybook. In the Arendelle of the past, Elsa and Kristoff must join forces to stop Hans from conquering the country.moreless
While Elsa wanders Storyrbooke and inadvertenyl summons a snowman to protect herself, Regina comes up with a new plan to assure that she finally has a happy ending in her life. Meanwhile, in the past, Anna and Elsa learn why their parents left Storybrooke and set out to find out where they've gone.moreless
The celebration of Mary Margaret and David's child is interrupted when Emma and Hook are pulled back to the past by Zelena's contingency plan.
Trapped in the Enchanted Forest in the past, Hook and Emma must work together to find a way home, without altering their friends' and family's present... and the Storybrooke of the future.
Mary Margaret goes into labor, and the residents of Storybrooke rally to protect her new baby from Zelena. In the Oz of the past, Glinda tries to convince Zelena to join the good witches as a protector of Oz, but the appearance of Dorothy Gale from Kansas may push her over the edge.moreless