Once Upon A Time Season 3 Episode 9 will air this Sunday, December 1. After the chaos we've seen last episode 8 'Think Lovely Thoughts' that lead to Peter Pan's getting Henry's heart, we will now see the magical family try to save Henry.

Read the full synopsis here:

"While Henry's life hangs in the balance, the race is on to stop Pan from gaining full magical powers from the heart of the truest believer. Meanwhile, in Storybrooke of the past, Regina decides to fill a void in her life and, with Mr. Gold's help, sets out to adopt a baby."

Check out the video promo below:

Here are Top 5 reasons why you shouldn't miss Once Upon A Time Season 3 Episode 9!

1. Henry's Still Alive (Obviously!) - This shouldn't be a surprise. After all, Henry is one of the main characters in the hit ABC series. At the beginning of the promo video, we see Regina and Emma holding Henry. Regina is rubbing Henry's chest saying, "You're going to be alright Henry, we're going to get you home." This could also mean that the gang may have found a way to get Henry's heart back from Peter Pan.

2. Regina And Henry Story (Mother-and-Son) - In the upcoming episode, the back story of how Regina adopts Henry will unfold. On a different sneak peek video, Regina (still the Evil Queen) is seen talking to Rumple just right before she's casting the curse. While talking, Rumple told Regina, "Now, there's a hole in your heart. And, someday he will come to me and fill it." We all know that Rumple helped Regina got Henry. This could be the "hole in your heart" that Rumple was talking about.

3. Jolly Roger's Comeback! - The promo video also reveals that the Jolly Roger's back. Looks like Captain Hook found a way to get his old ship back. And, it's flying! The promo video also reveals that the gang might be facing Peter Pan while on the ship. There's even a part where Regina is releasing what looks like a very powerful magic.

4. Peter Pan Vs. Emma - At the :10 part of the promo video, we see Emma getting a sword and facing Peter Pan. The promo video also reveals that Peter Pan can be hurt. They probably found this out when Emma tried to fight Pan using the sword. This could also probably the key for defeating the Pan. At :19, we also see someone trying to put a heart on Henry's body. This could mean that Emma and the gang finally found a way to defeat Peter Pan. Regina also said, "If he can be hurt, he can be killed." But, then again, at the end of video we find Snow, Emma, and Regina tied to a tree.

5. Rumple And Pandora's Box - From previous episode, Pan was able to capture Rumple and trap him inside the Pandora's Box. However, in the promo video (:06), we see the gang finding the Pandora's Box. At :16, we also see Neal opening the Pandora's Box. This could be Rumple's way of escaping. But, again, we're talking about Peter Pan here. He might be up to something.