Ariel makes a one-episode guest appearance in season 6, where she meets fellow princess Jasmine of Agrabah.
In the flashback portions of the episode, Jasmine and her father the Sultan are in trouble, for the sorcerer
Jafar has threatened to destroy Agrabah with his magic unless Jasmine marries him. The Sultan wants Jasmine to
marry a powerful prince with an army to protect Agrabah from Jafar, but Jasmine wants to find a different
Jasmine goes into the marketplace, where she crosses paths with Ariel. Ariel is in Agrabah in search of
Prince Eric, who is in the middle of his voyage. Back in season 3 episode Ariel, Ariel had just missed
joining Eric on his voyage, and had her voice stolen from her by Regina. The flashback segment of this episode
has Ariel having regained her voice thanks to a magical necklace that also gives her legs. This has enabled her
to chase after Eric in the hopes of catching up with him.
Jasmine and Ariel meet when Jasmine saves Ariel from a merchant's wrath. Ariel had unknowingly stolen a fork,
but Jasmine intervenes when the merchant threatens Ariel with violence. From there, Jasmine sympathetically listens
to Ariel's tale of her search for Eric, and is then intrigued because as a prince, Eric has a navy, which might be
just what Jasmine needs to protect Agrabah from Jafar.
Using the magic carpet, Jasmine and Ariel find Eric's camp. With Jasmine's encouragement, Ariel goes to see
Eric and confesses the truth, i.e. that she is a mermaid. At first it seems Eric is accepting, but then he
starts talks about how he much loves merpeople -- especially how delicious they are to eat. Unfortunately this
Eric is merely Jafar in disguise, and the real Eric is nowhere to be seen. Although Ariel wants to help her new
friend protect her kingdom, Jafar magically sends Ariel back to the ocean she came from.
In episode's present time, Jasmine and Aladdin (with Hook in tow) are on the search for Jafar, who magically hid
the entire kingdom Agrabah somewhere secret. Their search brings them to Hangman's Island, which is where Ariel and
Eric have happily settled down together. Ariel, Jasmine and Hook are delighted to see each other again, but there's
business to attend to. Namely, the reason that they're there is because Ariel's massive hoard of human things
includes the lamp that Jafar (as a genie) is trapped inside.
Jafar is summoned from the lamp, and then he has a face-off with Jasmine who (thanks to the support of her
friends, including Ariel) finally succeeds in defeating him and restoring Agrabah back to its rightful state. Ariel
is just glad to help, and as a bonus gives Hook a magical shellphone (HAH) that allows him to talk with his love,
Emma, who's back in Storybrooke.