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

A rare-animal collector has designs on a white dolphin.

At the airport, a man drops a package of five disks into Jennifer's bag.

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

Aphrodite goes into labor during a hurricane.

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

Eager for ratings, a promoter tries to force a pro beach volleyball player to retire.

A stranger makes two attempts on the life of an itinerant blues musician.

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

Flipper finds a baby adrift on a raft.

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

A mermaid is spotted from a newly bought submarine.

A horse trainer takes a Thoroughbred to save it from an insurance scam.

A top lifeguard's performance is slipping seriously.

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

A 17th-century pirate ship fires on the Maria D.

An officer Tom knew in the Gulf War comes looking for revenge.

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

Reluctant, kidnapped Flipper is scheduled to perform for Castro.

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

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

An environmental terrorist targets the institute.

Keith and his brother, Sandy, battle shark poachers.

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

A dashing Portuguese seeks a sword that could revise history.