On the upcoming episode of Once Upon a Time, Ariel (guest star JoAnna Garcia Swisher) will help out the gang in their quest to save Henry (Jared Gilmore).

Viewers will be introduced to Ariel a.k.a. the "Little Mermaid" in the upcoming sixth episode of the season, appropriately titled Ariel. She will be of use to the main characters searching for Henry, according to Garcia Swisher.

"Well, mermaids can swim between realms, so that ability becomes quite handy and useful to the gang," she told TVLine recently. "They call upon Ariel to maybe help in their fight."

The episode will also feature a flashback to the Fairytale Land That Was, with Ariel saving Snow's (Ginnifer Goodwin) life. Viewers can also expect the debut of another Little Mermaid character: Ursula. Lana Parrilla, who also plays Regina on the series, will be playing Ursula despite previous information suggesting otherwise.

Garcia Swisher said that Ursula will come into the picture when Ariel decides that she really wants to be with Prince Eric (Gil McKinney).

"Well, there's always a price to pay with magic, and when you dangle the idea of being with Eric in front of Ariel, she will go to no end to make it happen," she teased.

The actress promised that there will be some recognition in Neverland when Ariel and Regina come face to face.

Little Mermaid fans can come to expect nods to the 1989 animated film throughout the episode.

Once Upon a Time airs Sundays at 8 p.m. on ABC.

Watch a promo for the upcoming episode of Once here:

Tags
Once Upon A Time, Once Upon A Time Season 3, Spoilers