A Japanese guest asks Greg to help locate his late father's ceremonial sword, believed to be on a sunken patrol boat near Butterfly Island.
Jackie and Greg risk danger when they visit Parrot Island and encounter illegal bird trappers.
Dolly Meacham, an upbeat senior, asks Greg to teach her windsurfing.
The children attempt to protect the coral reef from Crown of Thorns starfish. During the process, Greg's leg becomes trapped under a rock, and his air supply decreases, prompting Kristy to seek assistance.
A bush-fire occurs on the island, and Mike Marshal, who previously worked as a Hollywood stuntman and is currently employed there, uses a technique he learned as a stuntman to rescue Jackie.
A boy who visits the island gains an understanding of friendship.
An elderly magician visits Butterfly Island, and Jackie gives him a tour to lift his spirits.
Greg and Jackie have determined that the dog responsible for biting Paddy's leg has fled into the bush and appears to be exhibiting signs of illness.
Charlie, Greg, and Kristy examine a mysterious schooner near the island.
Jackie shows her friends why protecting the environment matters.
Jackie becomes stranded after her rubber raft hits a rock and starts to deflate. Mary observes Jackie's life jacket floating in the water and moves upstream to try to find her.
Jackie and Greg are held captive by a deranged man in the old lighthouse one terrifying night.
Greg finds parcels of black pearls while snorkeling and is accused of smuggling.
A group of delegates travel to Butterfly Island to attend a high-security conference. Mr. Burnside, the supervisor, gives his briefcase to Cassidy, but unexpected complications arise.
Jackie hears unlikely stories from a gypsy woman.
An unexploded naval mine has been found at Nursery Bay on Butterfly Island.
Jackie risks her life to hide the new fix-it man's errors.
The children discover a coral cave. A visiting executive endangers both his own life and Kristie's. Kristy and hotel guests are swept out to sea during a reef tour.
After observing the relationship between Greg and Charlie, a runaway makes the decision to alter the course of his life.
Kristy persuades a runaway to go back home.
Greg answers a request for assistance and discovers Dennis suspended upside down from the mast of his boat. He learns that Dennis is an inexperienced sailor and has a tendency toward accidents.
The island is placed under quarantine when guests are suspected of having cholera.