Heading into Sunday's new episode of Once Upon a Time, most viewers are focused on the show's impending flashbacks, which won't just delve into Emma's past... but will re-introduce fans to the mystery man from the Season 2 premiere.

Seriously, what is that guy's deal?!?

But, in the Enchanted Forest, Emma and Snow will be faced with a question of their own: Can they trust Captain Hook? In the following sneak peek, the pirate explains his plan to track down the magic compass that will take everyone back to Storybrooke.

There's just one problem, of course. One GIANT problem. Watch now:

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