Following the destruction of a WASP submarine, Troy and Phones are sent to investigate. They are soon captured by an enemy submarine in the form of a gigantic fish, which takes them to the underwater city Titanica. There, they meet Titan for the first time.

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 beast exists.

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.

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.

While the Stingray crew go to the rescue of two crazy treasure hunters, Troy falls down a crevasse, runs out of air and goes into unconsciousness. When he comes to, he discovers he doesn't need breathing equipment to breathe and he is now the richest man in the world.

The Stingray crew aid Professor Graham in his search for the missing temple of Tajmanon 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.

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.

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.

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

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

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.

Professor Darren has developed a way to make gold from minerals on the sea bed. Agent X 2 Zero spies on the first test run & reports to Titan. Titan wants to destroy the Prof.'s Bathyscape & Stingray in one go when Stingray calls to collect the gold & deliver supplies to the Professor. Troy manages to save the mining operation & outsmart Titan once again.!

An underwater alien takes an ex-WASP admiral and his wife captive.

After receiveing 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!