In a new interview, Once Upon a Time actors Ginnifer Goodwin and Josh Dallas talk about Sunday’s Snow White-centric episode ‘Heart of Darkness.’ Beware of spoilers.

Speaking to TV Line, Ginnifer Goodwin explains that in this episode, Snow White sets out to kill the Evil Queen after taking Rumpelstiltskin’s potion:

She definitely walks a different road. [She] didn’t think about the repercussions of taking a potion that would erase the memory of love, that it would affect all aspects of life.

Prince Charming is hot on her tail though, and Josh Dallas teases:

He’s doing the best he can to get her to remember. It’s an epic episode with lots of action, and the storytelling is super exciting.

Check out a sneak peek from the episode featuring Snow and Charming:

You can watch the other two sneak peeks here on Hypable! The episode airs tomorrow night at 8/7c on ABC.