The Floating Palace

 is a special Sofia the First episode that will air in November 2013 on Disney Channel as a Family Night special event.

Plot
When Princess Sofia goes on a high-seas vacation, she befriends a young mermaid named Oona. When Oona gets captured by a sea monster, Sofia seeks out Princess Ariel, and together they work to save the day.

Note

 * Second time a princess shows up in a special (Cinderella) and 2nd special of the show (Sofia the First: Once Upon a Princess).
 * The third time Sofia has undergone a magical transformation. In Cedric's Apprentice, she became a lizard. In The Amulet and the Anthem, her voice became that of a frog's.