The crew of the Seaspray in a desperate search for water find themselves on a deserted Island. They meet a Flight Officer left there for survival training who is convinced the Island is inhabited by hostile forces possibly Japanese soldiers who still think WW2 is in progress.
When the Seaspray arrives at a Fijian copra plantation island, Captain Wells and his crew see a young Fijian on shore yelling for help. Upon investigating, Wells and his sons are held prisoner by Charlie Watts, the corrupt manager of the plantation, who rules his workers by force.
After a bank robbery on the Fijian island of Levuka, police suspect that the bandits may attempt to use the Seaspray as a means of escape. When some thugs attack Captain Wells, he is assisted by John Miller, a tourist.
The Wells children are shopping in the Fijian town of Lavtoka when they are told by a strange fortune-teller to beware of danger lurking everywhere. Subsequently the Seaspray crew explore an island laced with booby-traps set by Nazis. Notes: Filmed in Fiji.
On an uncharted Pacific isle, Captain Wells and his family encounter descendants of some survivors of the ‘Bounty’ mutiny.
On a remote Fijian island, Captain Well's friend Chief Polandi tells him that Davu, the village witch doctor, is under the control of a white man who wants possession of the island's rich minerals.
Mike and Sue are left to care for an injured man they find on a New Zealand glacier, while Captain Wells and Willyum go for help. The man turns out to be a criminal fugitive who takes Mike and Sue hostage. Notes: Filmed in New Zealand, with extensive scenes shot on the Tasman Glacier on the south island.
When the crew of the Seaspray visit a gold mine in Fiji, Willyum sees two thieves holding up the manager.
Captain Wells provides passage to an Oriental gentleman who will not discuss the details of his trip other than his destination - Kontau.
The crew of the Seaspray become involved with horse thieves when they arrive in Wellington, New Zealand. Notes: Filmed in Wellington, New Zealand.
The Seaspray has reached an exotic, isolated island. When Captain Wells hears that the island is said to be haunted, he decides to explore it. He hears strange shrieks, groans and moans everywhere.
Commissioned to carry coconuts from a Fijian plantation, Captain Wells learns he has been given the job to break the monopoly of Captain Bracken, who has terrorized all other shipping off the route. The Seaspray later narrowly survives an attempted bombing.
Captain Wells and his family are shocked by the hostile reception they are given by the inhabitants of Bareknuckle Bay, a small fishing village in New Zealand.
Captain Wells saves the life of an animal lover, and is puzzled when an old man breaks into the Seaspray galley. He learns later that the man has been shooting at loggers, and that the loggers are about to hunt him down.
Captain Wells and his crew tangle with a gang of kidnappers who use a submarine to abduct a famous scientist from a pleasure cruiser.
On a Fijian island, Captain Wells and his crew encounter a dictatorial woman missionary, whose ideas of Christian charity are backed by a loaded rifle.
In New Guinea waters, Captain Wells and his crew visit an island and have a dangerous adventure when they find out why it got the name of 'Island of the Angry God'.
When the Seaspray arrives in Sydney, Australia, Sue and Mike head for Bondi Beach. There they meet a girl called Mona, who teaches them surfing, and who is also involved in the theft of a valuable art collection.
Captain Wells finds that a stranger has taken over the Seaspray and re-named it as part of a plot to abduct a powerful native leader for ransom. Notes: Filmed in New Guinea.
The crew of the Tiara feel that Captain Parker is jinxed because so many natives have fallen sick in his presence. Captain Wells finds that Parker, an old friend of his, has a serious tropical fever.
When the Seaspray picks a stranded space capsule out of the ocean, Captain Wells learns that it is actually a secret spy camera, and it soon becomes apparent that certain foreign powers desperately want it.
In New Guinea, Dan Wells, Mike and Sue try to prevent another occurrence of 'payback murder', the native belief that if a tribesman dies from any cause, a member of another tribe must be killed in balance.
While trout fishing in New Zealand, Captain Wells and his crew realize that pollution has killed all the fish. An angry Wells becomes interested in the activities of Clint Hardin, who owns a fleet of crop-dusting planes.
Synopsis: As the Seaspray sails along the New Guinea coast, Captain Wells sees smoke rising from a remote island and, thinking it may be a distress signal, decides to investigate. Wells discovers two white men after gold on the island, who are controlling the natives through fear by the use of ‘magic’ tricks.
When the Seaspray crew find several large pearls in oysters for which Mike had dived, they become involved with a gang of pearl thieves.
After the Wells family arrive at the farm of their friend Tim Mitchell, Sue discovers a dying prospector in a lonely cabin. He gives her a note for a 'Miss Daisy' and a valuable sapphire.
In Melbourne, Australia, after a man named Charlton has chartered the Seaspray for a voyage to Fiji, the police ask Captain Wells to detain him as long as he can.
In New Zealand's McKenzie country, the Seaspray crew help a woman sheep farmer defeat another who is using underhand methods to try and squeeze her out of business. Notes: Filmed in New Zealand.
Off Eden on the New South Wales south coast in Australia, the Seaspray crew pick up a bundle of counterfeit money that brings them nothing but trouble.
In Melbourne, Australia, the crew of the Seaspray pick a foreign man out of the harbour, and he claims that his country's secret police are after him and says he wants political asylum in Australia. The Seaspray crew and the police are led on a merry chase when it is found out the man is a jewel thief who has double-crossed his accomplices.