H2O: Mermaid Adventures Season 1 Episode 13 - The Lost Ring

Airdate: 2015-May-22

Episode summary:

After spying on her father and worrying that he might be making a big mistake with his new girlfriend, Rikki takes matters into her own hands.

About H2O: Mermaid Adventures series:

Three high school friends who turn into mermaids whenever they touch water have undersea adventures while keeping their new life a secret.