ONCE UPON A TIME Season 5 Episode 8 IMAGES: “Birth”

ABC’s Once Upon a Time is serving up a double helping of mystery and intrigue on Sunday with back to back episodes “Birth” at 8 pm and “The Bear King” at 9 pm.

We’ve got a collection of images from the first hour, “Birth” to share in our gallery below (More to come).

Catch it following ABC’s official log lines (in case you missed them) from both episodes.

BIRTH

Guest Star Jamie Chung Reprises Her Role as Mulan and Meghan Ory Returns as Ruby In the first hour of this special Once Upon a Time event

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.

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. 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 flashbacks, Merida learns about bravery and honor as she trains for combat and rides alongside Fergus into the infamous battle that claims his life, in the two-hour Once Upon a Time, event.

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ONCE UPON A TIME - "Birth"

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ONCE UPON A TIME - "Birth" - In the first hour of this special "Once Upon a Time" event - "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, in the two-hour "Once Upon a Time," airing SUNDAY, NOVEMBER 15 (8:00-10:01 p.m., ET) on the ABC Television Network. (ABC/Eike Schroter)COLIN O'DONOGHUE, JOSH DALLAS