A young girl and her boyfriend plot to steal a plaque that has value only to its owner. Salty foils the plan of a girl and her boyfriend, who were attempting to collect the reward for jewelry they stole from the boy's uncle.

While conducting an undersea tour, Taylor's submarine gets trapped in a cave.

A recluse thinks he and his treasure of gold are safe from the world, especially from his ex-partner, who is already on his trail. When the boys stumble on his hideout, it is only a matter of time before the ex-partner follows and is willing to sacrifice them all to take revenge on those he believes are responsible for his son's death.

A frantic search for Tim begins after lab tests indicate that he has eaten rancid food.

In his rush to bring insulin to a stranded diabetic, Tim takes the wrong boat and runs out of gas midway with no radio to signal for help.

Taylor is suspected of looting sunken treasure when a bag of artifacts is found on his skiff.

Two scheming animal dealers have their eyes on Salty for a circus act. The need for a sea lion quickly and illegally triggers a plan to make it appear as if Sally has gone wild and damaged the marina, warranting his immediate sale.

Three bank robbers hold Rod hostage while they wait for his father to ransom him.

A man who believes in nature's healing powers may witness his daughter's final hours, unless he allows a doctor to examine her.

Tim and a friend stumble across a couple of gold thieves when they find what seems to be a quiet little bay for fishing.

Clancy and Porterfield become suspicious of a businessman and a stranger who is offering large sums of money to buy the marina and the surrounding property.

A watch is lost overboard, and Salty retrieves it, resulting in a friendship being struck up with a professor.

Clancy wonders whether he’s getting too old to be doing marine engine overhaul jobs.

An outing for Tim and Rod turns into an entrapment in an abandoned house on a deserted island.

A second sea lion comes into the lives of Tim, Taylor, and Clancy when Splash shows up at the marina. Salty acts very withdrawn, leading everyone to believe that he is jealous of the visiting sea lion.

A friend of Rod's, visiting the island for a few weeks, is afraid both of the water and Salty.

Salty is missing. He's been caught in the net of Dobbs, the fisherman, who claims Salty for himself.

Clancy expects a very special visitor, Maggie Brown, a woman he once loved, who is now widowed. Fearing Clancy will leave the marina and go to New York to marry Maggie, Tim runs away.

Aunt Cleo has an adventurous outing when she joins Tim on a nautical picnic.

Tim and Salty find a Lucayan Indian neckpiece in the sand. Tim is led to believe that it brings good luck to the wearer.