Once Upon a Time in Wonderland finally premieres on Thursday, October 10, but you don’t have to wait until then to watch episode. Well, half of it, that is!

ABC posted an epic 20-minute extended preview of the episode, which means it’s a commercial-free look at Alice’s shenanigans — especially the wild tales of Wonderland that land her in an asylum!

“Behind every tale you know, lies a story you didn't. This is Alice's. But her story didn’t begin in Wonderland. It began in Storybrooke…” an ominous title card tells us.

From there, we see Rumple taking a stab with his Dark One dagger and the storm beginning in Storybrooke. Footage from Once Upon a Time with The Charmings, Emma, and Rumple is spiced with new clips featuring Grumpy — who we knew would appear with Cinderella at some point in the pilot — yelling at the Knave of Hearts (Michael Socha) as he refuses to help Storybrooke as it’s under attack. He pours himself a cup of coffee instead at Granny’s, and then is suddenly greeted by The White Rabbit. Now Alice needs their help.

From there, we enter the asylum, and to avoid any further spoilers, we’ll let you watch for yourself over at ABC.com. Trust us: it’s just as magical as Once Upon a Time, so prepare to sit in front of your computer screen for the next 20 minutes.

Catch the Once Upon a Time in Wonderland premiere on Thursday, October 10 at 8 p.m. ET on ABC.

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