Dr. Keith Ricks returns to Florida to head an ocean research team...

Pirates blow up a yacht, inspiring a search for Spanish coins and threatening the dolphins.

An environmental terrorist targets the institute.

A philandering wife and her lover frame a tuna fisherman for dolphin-clubbing.

Unscrupulous characters kidnap Flipper for a Cuban hotel's dolphin show.

Reluctant, kidnapped Flipper is scheduled to perform for Castro.

Keith and his brother, Sandy, battle shark poachers.

A mermaid is spotted from a newly bought submarine.

Mike tries to reunite his parents; an echolocation experiment fails.

After an underwater photographer and her pet moray turn up, so do a couple of corpses.

Flipper and Pam try to help a plane-crash survivor.

Pam, Keith and Flipper discover criminals with genetically engineered oysters.

Criminals want to salvage a nuclear missile from the ocean floor.

A surfer dazzles Maya; a benefactor has eyes for Keith.

Mike and Maya inadvertently bring back a deadly virus from forbidden Monkey Island.

Tracking devices indicate Flipper was responsible for two attacks on humans.

Mike finds Maya living alone with no food or electricity; Sydney takes an unwelcome interest in the institute.

After contacting pollutants, a sick dolphin strands itself near the institute.

The brother of a man Keith helped send to prison plans a deadly revenge.

A hotel owner seems unconcerned about sharks swimming near the beach.

After a diving accident, Keith's dolphin speech-synthesizer dominates his dreams.

Aphrodite goes into labor during a hurricane.