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?
An underwater alien takes an ex-WASP admiral and his wife captive.
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.
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.
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 it's pearl. However, the crew are unaware of their real intentions !!
Reports come in from all over the world about pink ice. Whilst investigating, the Stingray crew become trapped in the rapidly freezing pink water.
A film crew arrive at Marineville to make a movie on Stingray. Everyone will play themselves except Troy, who is to be replaced by an actor. What's worse is that the director is in fact Surface Agent X20 who has a plan to kill Troy !!
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.
After a man found in a coma is brought into Marineville, the staff are soon found in a trance like state. Can this be connected with the man?
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.
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.
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.
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.
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.
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.