Once Upon a Time  Season 2, Episode 17: "Welcome to Storybrooke" is going to give fans a look into Storybrooke's past, with a flashback that takes us to the early days of the curse. And you know what that means: Jamie Dornan is back to reprise his role as the sorely missed Sheriff Graham).

Wetpaint Entertainment spoke with Jamie before Sunday night’s episode. After asking him about   Graham's relationship with Regina, we also wanted to know about the rest of the flashback, and he was nice enough to give a spoiler-y tease.

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As fans who like spoilers know already, this episode will feature a father-son duo who somehow make their way into Storybrooke, much to Regina's chagrin, since the town is supposed to be undetectable.

So what's up with the mysterious duo? Jamie couldn't tell us too much, but he did confirm that "there's a reason why these guys are coming to town, and there's a fairly big revelation in terms of one of [them]. It adds a lot of stuff up that we've already seen in Storybrooke in Season 1. It'll all make sense when you see it."

Do you find this answer as fascinating as we do? Get speculating about what it means in the comments below!

Read more OUAT spoilers here.

For more from Jamie, check out part one of our interview, and come back tomorrow to hear about his latest project, The Fall. Plus, you can follow him on Twitter @JamieDornan1, and of course you shouldn't miss this week's Once Upon a Time on Sunday, March 17 at 8 p.m. ET/PT on ABC.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.