Sabrina travels to Australia's Great Barrier Reef with her best friend Gwen, a fellow witch from England, for a week-long vacation where they try to help protect a hidden mermaid colony whose habitat is threatened by ocean pollution, and by a local marine biologist determined to find the colony as his claim to fame. While Sabrina finds romance with a "merman" from the mermaid colony, Salem the cat finds a possible romance with another witch-turned-into-a-cat, named Hilary, but finds Sabrina's problems interfering with his plans.
Melissa Joan Hart
Sabrina Spellman
Tara Strong
Gwen
Scott Michaelson
Barnaby
Lindsay Sloane
Fin
Nick Bakay
Salem Saberhagen (voice)
Peter O'Brien
Dr. Julian Martin
Rebecca Gibney
Hilary Hexton, the Cat & Woman
Conrad Coleby
Jerome Hestor
