'Once Upon a Time': Kathryn's Disappearance Tests Emma's Intuition (Exclusive Video)

Storybrooke’s residents can’t leave the town or something bad will happen to them. That’s part of the curse on ABC’s Once Upon a Time and a lesson Kathryn (Anastasia Griffith) seemingly learned when she tried to leave on the last episode.

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Now, Emma (Jennifer Morrison) will have the biggest case of her very new career as the town’s sheriff.

“Kathryn’s disappearance is going to take up a lot of her time and test her emotionally,” Co-creator Edward Kitsis says of Emma’s investigation, which will span several episodes.

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The next episode will also delve into dwarf Grumpy’s (Lee Arenberg) back-story and explain how he went from “Dreamy” to his current name with guest star Amy Acker (Dollhouse, Angel) playing a big role in that story.

Watch The Hollywood Reporter’s exclusive sneak peek above.

Once Upon a Time airs Sundays at 8 p.m. on ABC.

What do you think happened to Kathryn? Tell us in the comments section below.

Note: Acker's credit corrected.

Email: Jethro.Nededog@thr.com; Twitter: @TheRealJethro