"The Mystic Isles: The Falcon's Eye" is the ninety-ninth episode of the Disney Junior animated series Sofia the First. It premiered on October 27, 2017 and is the sixteenth episode in the fourth season.
Chrysta is teaching Sofia how to use the Necessi-Key, a magical key that can be used to make a magical door wherever and whenever it's user wants, however it only lasts for a few seconds. Meanwhile back at the Protectors' Castle in the Mystic Isles, Prisma is lamenting inside her cell about how she cannot escape despite the fact that the Locket of Vor (whose magic Prisma believes will be the key to her freedom) is right in front of her because she cannot reach the locket due to it being stored in a strong vault facing yards across from her cell. Suddenly, a rat named Twitch appears before her and reveals that he is a strangling, a shapeshifter, which he proves by using his powers. Prisma asks Twitch to retrieve the Locket and gives him instructions to pick the crystal lock. Twitch does as Prisma instructs and gets her the Locket. Prisma thanks Twitch and promise to share whatever power the Locket gives her. She then puts the Locket on and opens it, releasing a spirit trapped inside. The spirit is happy to be free and asks what powerful creature freed her, to which Prisma reveals that it was her. The spirit knows Prisma has no power, to which Prisma reveals that is why she needs her power to break free. The Spirit reveals that the only power it can give is the Power of Knowledge and tells Prisma she knows where she can find the Wicked Nine, nine magical objects hidden throughout both the Mystic Isles and the EverRealm that belonged to history's most devious villains such as Jafar's Snake Staff and Ursula's Necklace. The Spirit tells Prisma that if she gathers all nine objects and brings them to her she will use their power to restore her own. After Prisma remembers she cannot get out, Twitch offers to retrieve them for her since he has always wanted a powerful master and has picked Prisma. The Spirit tells him the first of the Wicked Nine he needs to find is the Falcon's Eye, a magical jewel that is hidden under the hilt of the Sword of Shan Yu, in a marketplace in Wei-Ling. After Twitch leaves to get it, two of the Protectors come in and discover that the Locket of Vor has been stolen and alert the other Protectors.
Vega contacts Sofia and Chrysta and informs them of the theft, and how the Wicked Nine are being sought out by the thief. After Chrysta explains to Sofia what they are, Vega explains to Sofia the danger of the Wicked Nine being brought together and dispatches the pair to Wei-Ling to protect the Falcon's Eye. The pair arrives in Wei-Ling on the Kingdom's Market Day. When they find the sword, they decide to set a trap for the thief. Jin and Jun show up and Sofia decides to tell them what is going on. Chrysta, however, is against getting them involved and insists that they are left out of it on the grounds that it is Protector business. After Jin and Jun leave, they watch one of Kai's dances before finding a place to watch the trap. When Kai dances in front of the spot, Chrysta orders Sofia to make him leave, which she politely does. Twitch tries to get the sword and falls into the trap. He turns himself into a skunk before Sofia and Chrysta arrive, causing them to dismiss it as a false alarm. Chrysta tells Sofia that the thief is probably a bad guy wearing the locket. Hearing this, Twitch drops a bunch of lockets on the ground to create a distraction. A man picks up one of the lockets and puts it on. When they see the man, Sofia and Chrysta assume he is the thief only to discover it is Emperor Quon. Meanwhile, Twitch steals the Falcon's Eye. He then turns himself into a bat and flies away. Meanwhile, Sofia and Chrysta realize they were distracted and find the Falcon's Eye gone. Kai, who witnessed the theft, tells them what he saw. Chrysta deduces that the thief is a strangling which she declares will be difficult to catch. She is unhappy with Kai not warning them, but he says he did not know they need to catch a thief and it is understandable because Chrysta ordered Sofia not to ask anyone else for help. This makes Chrysta realizes that just because she is the trainer, she does not always know best so Sofia comes up with a plan and brings in Jin and Jun to help and the group chases Twitch all over Wei-Ling.
They corner him at a wall, which he goes through a hole. After going through the wall with her Necessi-Key, Sofia successfully retrieves the Falcon's Eye, but Twitch steals Sofia's Necessi-Key and escapes. Sofia and Chrysta take the Falcon's Eye back to the Mystic Isles to give it to the other Protectors for safekeeping. Meanwhile, Twitch delivers the Necessi-Key to Prisma, who uses it to break free and escape. When they get back, Sofia and Chrysta learn about Prisma's escape and how she is behind the thefts. Sofia proposes bringing as many of the Wicked Nine back to the Protectors' Castle for safekeeping. Vega agrees and dispatches the other Protectors to do that. Meanwhile, Prisma is making her next move to regain her powers and get her revenge.
- Ariel Winter as Princess Sofia
- Megan Hilty as Prisma
- Jurnee Smollett-Bell as Chrysta
- Jesse L. Martin as Kai
- Forrest Wheeler as Prince Jin
- Michaela Zee as Princess Jun
- Jeff Bennett as Twitch
- Ming-Na Wen as Vega
- Paty Lombard as Vor
- James Sie as Emperor Quon
- The Wicked Nine belong to the Disney Villains who are the enemies of the Disney Princesses that have appeared on the show, except for Belle's villain, Gaston.
- Since the Amulet of Avalor has the power to summon a Princess from any point in time and summoned Tiana from the future, Dr. Facilier's hat could also be from the future as well.
- When Twitch takes and drops lockets in the market, he is holding Amber's amulet from "The Mystic Isles".
- Sofia uses her Enchantlet and Necessi-Key and mentions the Protectors in front of Jin and Jun, and the latter two don't even get suspicious.
- Moral: Ask for help when you need it and don't insist you have everything under control.
- The shirt of one of the men who tried to arrest Emperor Quon changed from green to red and back to green.