Once Upon a Time season 5
Hook and Emma in Once Upon a Time season 5ABC

Once Upon a Time season 5 returns with a two-hour special where Emma will make a gut-wrenching choice that will shock the fans. Hook will finally learn about Emma's dark plan in the episode titled, Birth/The Bear King airing this Sunday, 15 November at 8pm EST on ABC Network.

Click here to watch it via live stream on ABC, or click here to watch it online on ABC's official website. Here is the official synopsis for the first hour of this special episode, Birth:

Tensions in Camelot come to a head when Merlin, now under Arthur's control, delivers an ultimatum to Emma: hand over the Dark One dagger and the Promethean spark or he will kill her entire family. Refusing to give in, Emma and our heroes face off against Arthur, Merlin and Zelena in an epic battle of magic and will. Just when the end is in sight, Emma is forced to make a gut-wrenching choice that no one saw coming. Back in Storybrooke, Zelena's pregnancy mysteriously accelerates and Hook goes to new and desperate lengths to get answers from the Dark Swan.

Once Upon A Time season 5
Ruby and Mulan return to Once Upon A Time this Sunday for a 2-hour episode.ABC

In the second hour of the episode, Merida teams up with Mulan and Rudy for a very personal mission in Dunbroch. According to the synopsis for The Bear King, "Zelena and Arthur journey to DunBroch on a mission to retrieve an enchanted relic that will provide the advantage they need to vanquish Emma and our heroes. Their path will cross with Merida's, who is on a journey of her own to pay a debt that her father, King Fergus, owed to the Witch when he died".

Elsewhere Merida enlists the help of two friends, Mulan and Ruby, but, in order to satisfy the Witch and save DunBroch, she first must discover the identity of the knight who killed her father. In flashback scenes, Merida learns about bravery and honour as she trains for combat and rides alongside Fergus into the infamous battle that claims his life.

Merida meets Mulan in this sneak peek from Sunday's all-new #OnceUponATime 2-hour event!

Posted by Once Upon a Time on Friday, 13 November 2015

Hook wanted answers, but did he want THIS answer? Here's a peek at Sunday's 2-hour #OnceUponATime event.

Posted by Once Upon a Time on Thursday, 12 November 2015