When Captain Troy Tempest and Phones Sheridan investigate the destruction of a World Navy sub, they are attacked by an enemy submarine in the form of a gigantic fish. The two Stingray crewmen are taken prisoner and brought to the under sea kingdom of Titanica. There, Troy is brought before the mighty ruler Titan who orders him put on trial for crimes against the undersea races. The mighty sea god Teufel pronounces Troy guilty and he and Phones are sent to the Aquatraz prison but, before they reach there, the Stingray crew are rescued by Titans mute slave girl, Marina.

Enraged by the escape of the Stingray crew with Marina, Titan has Surface Agent X20 deliver a beautiful but deadly plant to Marina's father who then unknowingly bestows it upon his visiting daughter. Back in Marineville, Atlanta removes the protective glass cover and is felled by the deadly fumes. Commander Shore believes that Marina may be a Titan spy and sends her into the room with the plant. When she, too, collapses, Shore is finally convinced of her innocence.

Atlanta is captured by an undersea race when Stingray investigates the collapse of an oil drilling rig. She discovers that the creatures only attacked the rig out of self-defence, believing that their home was under attack. Unfortunately, a bomb has been planted aboard Stingray that will explode when the ship dives. Atlanta makes a desperate effort to contact Stingray but, fortunately, Marina's pet seal, Oink, discovers the bomb and pushes it off in time.

When Admiral Carson and his wife are taken prisoner by Gadus, Stingray comes to the rescue. Thanks to the Admiral's secret coded signal, Troy and Phones manage to avoid the bomb Gadus had left behind in the couple's lonely island home. The Stingray crew pursue Gadus' ship down under the sea to a deep trench, too small for Stingray. When Marina attempts a rescue she is captured, leaving Troy and Phones to brave the tunnel's fantastic pressures before Marina is killed by a swordfish with a razorsharp sword!

While following an old treasure map purchased by Phones, the Stingray crew encounter a pair of underwater pirates who have lived well for 300 years from shipwrecked goods brought to them by the same whirlpool that delivered Stingray into their hands. When Troy refuses to agree to the rescue terms to a Captain Black, the Stingray crew must battle their way out.

After destroying an underwater gunship, the Stingray crew pursue a second ship into an undersea tunnel and down, down into the bowels of the earth. There they happen upon the city of Solarstar, source of the gunships. As the water pressure threatens to crush Stingray, Troy attempts to fire the Sting Missiles against the city and its approaching gunship. With the aid of Marina, who can tolerate the pressure, they manage to destroy the enemy sub and base.

When Titan discovers that Stingray has been assigned to make monthly visits to a team of scientists who are mining gold from the sea he plots to use a giant killer swordfish to destroy his enemies. By using a sounding device to attract the fish, Titan orders it placed on the scientists' bathysphere. Troy, however, manages to turn the tables when he puts the sounder on to the hull of Titan's ship.

Commander Shore and Phones are taken prisoner by Idotee who uses an old Spanish galleon to attack ships. Shore demands that Troy launch Sting Missiles against the galleon but the Captain disobeys orders and boards the vessel. There he opens his air cylinders in the control room but unknown to Idotee the cylinders are filled with laughing gas! The alien is laughing so hard he fails to realise that he's captured.

Disguised as a professor who can teach mute people to speak, Troy and Phones place Marina unknowingly into the hands of X20. Using a tape of Troy's voice X20 gains entry to the Stingray pen. He leaves Marina tied up on board with a time bomb. When Troy and Phones return from patrol they discover Marina and the bomb. Troy takes control of X20's craft and manages to get the bomb out of Marineville in the nick of time.

In a flashback sequence we learn how Commander Shore was crippled in a sea battle with an underwater craft. He was saved by a mysterious stranger whom he never saw again. Now, years later, Troy gets to repay the Commander's debt when he saves the stranger's life during a battle with a hostile craft.

The Stingray crew tracks the launch site of missiles fired on Marineville to a volcanic island. Investigating, they are captured and Marina is tortured in an effort to get the coded signal that would destroy Marineville's interceptor missiles. During the night Troy and Phones escape from their cell and neutralise the warhead. A note left inside the nosecone steers wasp fighters to the island, forcing the aliens' defeat.

When their vacation is cancelled, the Stingray crew probes into the ocean depths, They discover a deep shaft that leads to desert-like plateaus. Before they can complete their investigation, a wall of water turns the desert into an underground sea. Swimming desperately back to Stingray they attempt to relocate the shaft before their oxygen runs out. Out of desperation they enter the first shaft they see. They surface near a beautiful tropical island. The perfect place for a holiday!

When Admiral Denver is f-rightened by the legendary Loch Ness Monster, Troy and company are sent to investigate. As they patrol the Loch, the creature attacks and Troy launches the Sting Missiles. To their surprise, the monster turns out to be a fake rigged up by two Scotsmen, Jamie and Andy, to attract tourists!

The Stingray crew is captured when aliens set up a trap at a weather station. During what appears routine questioning, they unsuspectingly give away vital secrets about Marineville. While Stingray is on patrol, the base is attacked from below. The Invaders are unaware that Troy is aware of the invasion and they are taken by surprise when Stingray comes to the rescue.

Two amateur divers trick the Stingray crew into helping them recover an enormous and priceless pearl from a giant oyster. Marina is concerned about a legend of bad luck involving these giant oysters and her fears prove correct when Troy finds himself in dire peril. Aid comes from an unusual source when the protective satellite oysters come to their rescue.

When Stingray comes to the rescue of two crazy treasure hunters, Troy runs short of air and dreams himself to be the master of a fabulous undersea castle with Atlanta and a talking Marina at his beck and call. All is well until the Aquaphibians attack. As the palace falls to ruin around him, Troy awakens safe and sound aboard Stingray.

Marineville is invaded by a film crew with everyone getting to play himself but Troy who is replaced by a dashing actor who both Atlanta and Marina are smitten with. The producer of the film is none other than X20 who plans to use the script's battle scene to kill Troy. However, the gallant Stingray captain proves himself to be a hero in more ways than one!

Troy and Phones discover a strange city of sunken ships when they search for three disused freighters that were to be blown up by remote control. The Nomads, who live in the sunken ships, are unaware of the timed explosives in their new requisitions and refuse to believe Troy. That is until one of the vessels detonates. The explosion jams the escape hatch. The second ship explodes but it is the nearby third one that could kill them. With only 10 minutes to go, they desperately manage to free the hatch and escape.

Troy locks horns with the boastful Naval Captain who arrives in Marineville to demonstrate a new missile. X20, however, loads the test missile with real explosives and it appears that the Naval Captain is actually out to kill Troy. Shore is ready to Court Martial the Captain until Troy proves the interference of Titan's subjects.

When a vital piece of equipment disappears from Marineville control, the clues point to Commander Shore. Painfully performing his duty, Troy arrests Shore and places him in the brig. Suddenly, another wasp officer admits to Shore that he is also a spy and wishes to join forces. The commander's plan has worked and the real spy is caught!

Troy falls asleep in the Stand-By Lounge and dreams that the Stingray crew are shrunk to Tom Thumb size and trapped in a fish-tank in a giant banquet room. Investigating on their monocopters, they discover that Titan is having a meeting here to plan a final assault on Marineville. The Stingray crew manage to destroy the invasion plans but escape seems impossible until Troy awakens!

Stingray investigates the incredible reports of pink ice all over the world. While checking out a possible area of attack, the sub becomes trapped in the rapidly-freezing pink water. Troy calls for Marineville to bomb the ice from the air to free the ship. As they dive, they encounter the mysterious enemy craft and destroy it, ending the pink ice threat.

Troy is poisoned by Titan in an attempt to blackmail Marineville into returning Marina to him. She agrees to Titan's demands and returns to Titanica. The antidote is sent to Troy and, fully recovered, he and Phones risk their lives to break into Titanica in a captured Terror Fish and rescue Marina.

A deposed Eastern Country leader, El Hudat, blames Marineville for the revolt in his country. He is ordered out of Marineville but he takes Marina with him against her will. Troy and Phones come to her rescue. El Hudat is captured just as he is returned to power and once again is eligibile for wasp membership. Commander Shore enrolls him and then points out that, as a wasp member, he can be punished!

Phones is convinced that he is unfit for duty when X20's plan to discredit him nearly succeeds. Disguised as a psychiatrist. X20 further discredits Phones' claim that he really did hear the sounding that drew Stingray away from their escort patrol. It's Lt. Fisher who discovers X20's remote sounding device that clears Phones.

The Stingray Crew rescue and return to Marineville a man appearing to be in a comatose state. He is actually in a hypnotic trance and under orders to put the rest of Marineville in a similar trance. Troy manages to awaken the populace before an attack can be launched.

Investigating the disappearance of a robot probe, Stingray is drawn to the bottom of a volcano where two survivors of a destroyed city attempt to steal Stingray to escape the erupting volcano. When Marina locks the hatch they are forced to return for Troy and Phones who have been left to die. Since there are only two sets of breathing gear, Troy and Phones must rely on their wasp training to make the swim to Stingray.

The Stingray crew aid Professor Graham in his search for the missing temple of ajmanon which was submerged when a dam was built in Africa. They encounter incredible dangers until they meet with El Hamra, an old colleague of Graham's who tells them that the temple was moved stone by stone to dry land.

Thinking all the commotion at Marineville signals the visit of a VIP, X20 kidnaps the man and delivers him to Titan. The undersea ruler is surprised to learn that X20 has brought Duke Dexter, a pop singer. Titan is convinced that Dexter is an ally of the underwater people by the way he drives the Terraneans crazy with the weird noises he emits. Dexter is freed by Titan to continue his 'good work'.

Shore takes up Admiral Denver's challenge that the wasp's of today can't take the rigours of an old-time sailing vessel. Phones and Lt. Fisher are assigned to Denver's crew. When a storm hits, Denver is knocked out and loses his memory and Phones and Fisher are cast adrift in a small dinghy. They are rescued by Troy who has been following in Stingray but, when Stingray approaches the sail boat, Denver begins firing his guns wildly at the sub. Troy, however, succeeds in overpowering Denver who later regains his memory in hospital.

X20 has planted a bomb in the bass fiddle of a jazz group that will give a concert at the undersea city of Aphony, Marina's father. Troy uncovers the plot but is trapped in a burning shack. He escapes just in time and races to Pacifica in Stingray in an attempt to save the lives of his friends.

Lt. Fisher takes command of Stingray in his training to become an Aquanaut. The exercise involves target practice on a Terror Fish target but X20 has attached a sticker bomb to one of the targets and one to Stingray's hull. Troy is air-dropped into the sea in an attempt to remove the bomb from Stingray's hull before it explodes.

While trying to decide what to wear to Atlanta's fancy dress ball, Troy falls asleep and dreams that he and Phones are pitted against a race of underwater cavemen who plunder the cargo of a vessel carrying radioactive material. Troy awakens from his adventure, inspired to wear a caveman outfit to the ball — as, in fact, does everyone else!

Shore gets off on the wrong foot with Professor Burgoyne, the 'boffin' sent to Marineville to develop the new super missile needed to destroy an indestructable craft heading toward Marineville. The Professor is presumed dead when his lab explodes but he calmly reappears to announce the success of his work. Armed with the new super missile, Stingray sets off to destroy the enemy sub.

Atlanta is taken captive by the crazed professor Cordo who rules a race of innocent underwater people. When Stingray arrives at his undersea farm he decoys Troy and Phones into a mock-up of Stingray while his subjects take command of the real craft and head for Marineville. Troy and Phones manage to overpower the professor in time to force him to recall Stingray before the creatures can launch their attack.

In this sequel to Star of the East, X20 aids El Hudat in a plan to free him from the Marineville brig and substitute his brother Ali Khali who has been de-throned. When the switch is discovered Stingray sets off in hot pursuit with Ali Khali aboard. They catch up with El Hudat's boat and the two brothers battle it out, eventually falling into the sea. Since they are dressed identically and impossible to tell apart, Commander Shore is forced to throw them both into the brig.

In an effort to brighten the Christmas of the orphaned son of an ex-wasp Aquanaut, Troy asks him to join the Stingray crew in the re-enactment of the battle when a mysterious enemy craft was abandoned. Unknown to anyone, a member of the crew is still aboard when Phones takes command. Held at gun point, Phones is forced to draw Troy into a trap but the Stingray captain manages to rescue his buddy and solve the mystery.

Disaster strikes when a pilot on approach to a new airfield crashes because the light of a closed lighthouse mysteriously comes on again, confusing the pilot. When the old lighthouse keeper returns to investigate, he is captured by an alien race who use the lighthouse's power to provide energy for their city. It takes the crew of Stingray th free the keeper and see to the survival of the city.

After receiving the 'Aquanaut of the Year' award, Troy is surprised to find himself the subject of 'This Is Your Life'. His most exciting adventures are re-capped in flashback before the interviewer pops the important question — are he and Atlanta more than just good friends? Before he can answer an alert is sounded, leaving Atlanta to assure the interviewer that there isn't enough time for romance in the wasps!