Dr Phil Harmon is attacked by a shark. He radios to bring a rare blood type that can save his life.

The boys find themselves in deep water when they disobey their father and dive down to investigate a car that has been dumped in the ocean.

Flipper comes to the rescue when a submarine gets caught on the bottom of the ocean, trapping its occupant who is fast running out of air.

Bud isn't happy with the new woman in his father's life. Feeling alone in the world, Bud stays out in the ocean too late and winds up lost in an underwater cave at high tide.

City boy, Mike Beldon arrives in Corel Key with a huge chip on his shoulder about his mother's new husband. However, a near death accident helps him see his new step-father in a different light.

Dorrie steals Flipper and sells him to a carnival owner.

Porter is concerned that Bud is taking old Hap Gorman's stories too seriously and warns his son that not everything the old man tells him is true.

Flipper's days are numbered when he is accused of eating a prized fish worth a lot of money. Just as Flipper is to be cut open to retrieve the fish, Bud and Sandy discover it has been stolen by Jim and race to prove their pet's innocence in before it's too late.

Bud and Sandy hear Flipper say in plain English he wants to leave for London with Professor Marvello, and the professor's circus colleagues bring nets to take Flipper away.

Flipper saves the life of an old Greek sponge poacher in the preserve, but Bud and Sandy tell Po of his illegal activities.

Po and Sandy rescue a despondent former water ski champion, now in a wheelchair, and her mother from a hurricane. Flipper gets tangled in a fishnet.

Despite their best attempts to impress a visiting Congress woman, Porter and the boys are devastated to learn that she plans to close the park.

In a last ditch attempt to convince Congress woman Helen Browning that she should use government funding to keep the Park open, Sandy and Bud take her skin-diving.

Bud and Sandy, on a trip with Hap Gorman to his secret fishing grounds, board an abandoned boat, not knowing that a hidden charge of dynamite is about to blow it to pieces.

Sandy, Bud and Flipper decide to become detectives when reports claim that someone has been looting boats in Coral Key Park.

When Flipper finds a Spanish doubloon on the ocean bottom and brings it to Bud and Sandy, rumours about Spanish Treausures spread quickly and an underwater gold rush ensues.

Flipper leads Bud to a beach where Lynn Borden lies half conscious after falling off a boat 20 miles at sea.

Porter Ricks, Sandy and Marine Researcher Dr Williams Tollner go to sea to investigate a school of lemon sharks which have invaded Coral Key Park.

Pretty teenager Bonnie McCoy takes Sandy by surprise when she sails into view aboard a floating zoo.

Flipper finds money underwater and presents some of the bills to Bud. Flipper shows Bud where it came from and they collect more from the underwater wreck.

Flipper goes to Bud and Porter Ricks for detective help after seeing a treasure chest stolen from the wreck of a sunken Spanish ship hidden on a nearby island.

Flipper disappears for several days and, when found by Porter Ricks, Sandy and Bud, is with another dolphin, an amazing albino the only white dolphin in Porter's memory.

While Sandy and Bud prepare for the annual Coral Key Park swimming race, Porter is overcome by toxic chemicals dropped from a passing ship while he is carrying out an underwater investigation.

Sentinel of the sea Flipper discovers a sinking raft, manned by Bonnie McCoy, her father, an elephant and a chimpanzee.

In an effort to raise money to pay off creditors of McCoy's Floating Zoo, Sandy and Bud join Bonnie McCoy in a scheme to run away with her father's elephant and chimpanzee.