Credit: ABC

On Once Upon a Time, viewers expect the unexpected, and in Season 3, things have been even more unpredictable with the addition of Neverland. The evil, yet charming, Peter Pan has led The Charmings & Co. into the depths of the island, causing Emma Swan to confront her past, present, and future as an abandoned child as she tries to find her son, Henry, and now a new frenemy is entering the picture: Tinker Bell.

As we’ve learned, the pint-sized fairy has a past with both Regina and Captain Hook, and one of their full back stories will be revealed in tonight’s episode (Season 3, Episode 3: “Quite the Common Fairy”), which was penned by consulting producer Jane Espenson.

We caught up with Jane at New York Comic-Con on October 12, where she teased a bit about the episode, including the future effects of Charming’s Dreamshade poisoning — and who it may affect next — and a shocking “big reveal” at the end of the episode that will “make you gasp.” Read on for our full chat, then catch the episode tonight at 8 p.m. ET on ABC.

Wetpaint Entertainment: Your episode of Once Upon a Time is all about Tinker Bell. What else can we expect?

Jane Espenson: We get to introduce Tinker Bell to the show, which is great. It’s a good performance and it’s a good story and you learn something kind of shocking at the end of the episode. There’s a big reveal at the end of the episode. The final frame will make you gasp.

Tink is very feisty, but she also seems a little more level-headed. In a sneak peek, we see she wants to help Regina find love. Is she as genuine as she seems?

Tinker Bell is a very genuine character. She is not pretending for anybody. She says what she means and she gets stuff done. I think she’s a great character, and she’s really fun to write for.

How is she different from the animated version of Peter Pan and her own movies?

She has elements in common with the traditional Tinker Bell. She is always a strong and headstrong character who is breaking rules, and our Tinker Bell is that is well. But the specifics are very unique, very different, and very much our show.

We’ll see her come into Neverland, which seems to shock Regina. Same with Hook, who also has a past with Tinker Bell. How complicated are their relationships?

The whole episode is about the past relationship of Tink and Regina, so you’ll see why Regina and Tink react to each other in the present day, in Neverland, when you see what their past was in Fairytale Land. As to Hook’s backstory with Tink? That remains to be told.

In this episode?

No, no — that remains to be told past the episode. You may not find out too much about Hook and Tink for a while.

We’ve heard that Regina’s love story may happen in Neverland. And it’s not Tinker Bell...

It could be!

Lana Parrilla [Regina] hinted that it could be someone we’ve already met. In  this episode, will we see a glimpse of that yet?

Yes! [Pauses] Well, you’ll see — let me phrase it differently. You will see an opportunity that Regina has had for love. Whether or not that’s in the future or not, I can’t speak to that, but watch the episode and watch all the way to the end.

Tinker Bell of course has her other fairy friends and foes. I know we see Blue in this episode, and Lee Arenberg [Grumpy] shared a photo with Amy Acker. Was that from this episode?

That may have been extra content that we did for Good Morning, Storybrooke for the bonus content that Lee and Amy were in, so that may have been from that.

So, there won’t be a fairy pow-wow. Will we see her again?

We would love to see Amy again! Amy is full-time on another show, Person of Interest, but she came to do an arc on one of Husbands’ most recent seasons. I consider her a great friend and one of the best actresses out there. Dramatic, comedic, she can do everything.

We have Charming who is poisoned with some nasty Dreamshade. Josh Dallas spoke a bit to how it will change him and affect his relationships with everyone. Can you tease his status in this episode?

It’s a nasty poison and you’re going to see that poison again. You’re going to see it a couple times. You saw it in the past, and you’re going to see other characters who have an influence in their life.

We saw some classic Bandit Snow in last week’s episode. Will she be back?

I feel like Snow has always got Bandit Snow in her. I like to use the word “Bandit Snow” just to mean when Snow gets assertive. I love when Snow is tough, and it’s always inside her, even when she’s Mary Margaret, I feel like inside her somewhere, there’s Bandit Snow.

What do you want to see from Tinker Bell in tonight’s episode? Sound off below, and catch Jane’e episode of Once Upon a Time at 8 p.m. ET on ABC.

Alyse Whitney is Assistant Editor at Wetpaint Entertainment. Follow her on Twitter and Google+.