Using Robin as bait, the Evil Queen sets out to destroy Regina once and for all. Meanwhile, Hook turns to Nemo for romantic advice after he proposes to Emma.
While Gideon discovers the individual who forged the blade and sets out to kill them, Hook talks with Archie. In the past, everyone considers Rumplestiltskin a hero after he defeats the ogres... except for one man.moreless
While David asks Hook to help him find out how his father Robert really died, Regina sets out to show the new Robin how to deal with Storybrooke.
Gideon tells his parents what happened to him after the Black Fairy abducted him. Meanwhile, Emma turns to Pinocchio for help in escaping the wish-created reality, while Regina tracks down Robin to ask if he's happy in his new existence.moreless
The Evil Queen uses the genie's lamp to get Emma out of her way. Meanwhile, David teams up with Henry and Hook to stop the Queen, and Gold and Belle face a threat to their son.moreless
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
While Regina tries to convince Cora to help her stop Zelena from leaving the Underworld with Hades, James tries to get revenge on his twin brother David.
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
Gold decides to help the others find Hook so that he can return to Belle. However, he has to find his ex-wife Milah to obtain her help. In the past, Rumplestiltskin must make a deal to save Baelfire's life.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
As the Snow Queen's spell closes in on Storybrooke, the townspeople prepare for the worst. Elsa tries to find her sister, who may be the only chance of a cure. However, Gold has his own plan underway to save himself, Belle, and Henry, and is willing to sacrifice everyone else to assure their escape. In the past, Anna and Kristoff attempt to find the Wishing Star so that they can recover Elsa.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