The Stingray crew track the launch site of missiles fired on Marineville to a volcanic island. However, on investigating they become captured by the aliens responsible.

Using an old Spanish galleon, the villainous Idotee is attacking passing ships and plundering them for their cargoes. He soon captures Commander Shore and Phones and holds them prisoner on his ancient sailing vessel.

When the Stingray crew has their holiday abruptly cancelled, they set off to probe the ocean depths. Troy and his friends soon discover a deep undersea shaft, which leads them to a desert-like plateau.

Commander Shore's friend Admiral Denver claims to have seen the Loch Ness Monster. As a result, the Stingray crew travel to Scotland to see if the legendary creature exists.

When Admiral Denver announces his opinion that the WASPs of today would not be able to handle his old-time sailing vessel, Commander Shore takes this as a challenge and assigns Phones and Lieutenant Fisher to the Admiral’s crew.

When a boastful naval Captain arrives in Marineville to demonstrate a new missile, he and Troy immediately experience a clash of personalities. Meanwhile, Surface Agent X20 sabotages the test missile by loading it with real explosives.

While out on escort patrol, Phones hears a mysterious sound through his headset. But when Stingray leaves the escort to investigate, the crew are unable to locate the source. Beginning to doubt his senses, Phones visits a psychiatrist - unaware that the doctor is none other than Surface Agent X20 in disguise.

While the Stingray crew go to the rescue of two crazy treasure hunters, Troy falls down a crevasse, runs out of air and lapses into unconsciousness.

When pop star Duke Dexter pays a visit to Marineville, he causes a commotion amongst his fans. Mistakenly believing him to be a visiting dignitary, Surface Agent X20 kidnaps the singer and takes him to Titan as a hostage.

Professor Graham is searching for the lost temple of Tajmanon, which was submerged when a dam was built in Africa. When Troy and Phones are assigned to aid the professor in his quest, they soon encounter their old enemy, El Hamra.

When Troy meets the orphaned son of an ex-WASP aquanaut, he decides to give the boy a Christmas to remember.

Learning that a jazz group is to give a concert in the undersea city of Aphony, where Marina's father lives, Surface Agent X20 plants a bomb in the group’s bass.

Commander Shore keeps having nightmares about the time five years ago when he was crippled in a sea battle with an underwater craft, and then rescued by a mysterious stranger.

As part of his training to become an aquanaut, Lieutenant Fisher is given temporary command of Stingray and assigned target practice.

Just as an aircraft begins its approach towards a new airfield, the light from a disused lighthouse comes on, confusing the pilot and causing him to crash.

After Stingray destroys an attacking submarine, another soon arrives to threaten Marineville. Foiling the assault, Troy, Phones and Marina pursue the sub into a deep undersea tunnel and come across the city of Solarstar.

Whilst musing over what to wear to Atlanta's fancy dress ball, Troy falls asleep. He dreams of encountering a race of underwater cavemen who have plundered the cargo of a vessel carrying radioactive material...

After a robot probe inexplicably disappears, the Stingray crew is ordered to investigate. Troy, Phones and Marine follow the trail to the base of a volcano, which is about to erupt.

An Eastern dictator named El Hudat arrives in Marineville, wishing to become a member of the World Aquanaut Security Patrol. However, just before his enrolment, he is deposed by a revolution back in his home country.

Troy and Phones rescue a comatose man and take him back to Marineville for treatment. Unknown to them, the man is actually in a controlled hypnotic trance as part of a plan to render everyone in Marineville unconscious and open to attack.

While waiting for the call to action in the Stand-By Lounge, Troy falls asleep. He dreams that he and the Stingray crew have all shrunk in size and are now trapped inside a giant fish-tank sitting in a banquet hall.

Having been dethroned by the people of his Eastern nation, El Hudats twin brother, Ali Khali, arrives in Marineville.

While the Stingray crew are on shore leave in Casablanca, a merchant sells Phones a map leading to ancient treasure. However, when Troy refuses to search for it, Marina secretly alters Stingray's course.

A film crew arrives at Marineville to make a movie on Stingray. Everyone will play themselves except Troy, who is to be replaced by an actor. Even worse, the director is in fact Surface Agent X20 who has a plan to kill Troy.

Reports come in from all over the world about pink ice. Whilst investigating, the Stingray crew become trapped in the rapidly freezing pink water.

When three disused freighters that are to be blown up by remote control mysteriously vanish, Troy and Phones set off in Stingray to find them.

After recovering a giant oyster, two explorers are captured by Troy in restricted waters. They persuade Commander Shore to let the Stingray crew help them collect its pearl. However, the crew are unaware of their real intentions.

The Stingray crew fall into a trap set by aliens at a weather station.

When a seemingly indestructible craft is sighted heading towards Marineville on a collision course, the eccentric Professor Burgoyne is called in to help develop a new super missile with which to destroy it.

When the insane Professor Cordo kidnaps Atlanta and takes her back to his undersea farm, Troy and Phones give chase in Stingray.

As part of his plan to destroy Marineville, Surface Agent X20 infiltrates the base by posing as a professor who can teach mute people to speak. Then, unknowingly, Troy and Phones place Marina in his hands.

The Stingray crew are sent to investigate the mysterious destruction of oil rigs.

Following the escape of his slave Marina, Titan plots revenge by planning to kill the Stingray crew with a deadly plant that gives off toxic fumes. Meanwhile, Marina is feeling homesick.

During a Terror Fish attack, Stingray is damaged. When Troy goes to make repairs, an Aquaphibian poisons him with some purple liquid. At Marineville, the doctors can't find a cure. Without treatment, ttroy will die within four hours.

The Stingray crew is assigned to make monthly visits to Professor Darren and his team, who have developed a method for making gold from minerals taken from the sea bed.

When an undersea alien named Gadus kidnaps World Navy Admiral Carson and his wife from their remote island home, Troy, Phones and Marina head off on a rescue mission in Stingray.

Commander Shore is framed when a piece of equipment disappears from Marineville control. Troy places the commander under arrest - but who would want to frame the commander, and why doesn't Shore protest his innocence?

After receiving the ‘Aquanaut of the Year' award, Troy finds himself part of a '‘This is Your Life' programme where he reminisces about some of his greatest adventures.

While waiting for Atlanta and Marina, Commander Sam Shore shows to Admiral Denver films showing the previous missions that Troy Tempest and Phones had with the submarine Stingray.