The crew of seaQuest are joined by a reluctant Captain Nathan Bridger and set off to investigate a distress call from an underwater colony, only to find it is a trap by a renegade sub under the command of Captain Marilyn Stark, who has a personal vendetta against the seaQuest.
Two miles beneath the surface, seaQuest explores one of the ocean's truly remarkable phenomena: steaming hot hydrothermal vents play host to an underwater forest of giant tube worms and other forms of life where none was thought possible. But when Darwin the dolphin becomes deathly ill, Captain Bridger is forced to choose between the mission at hand and the life of one of his crew.moreless
The crew of seaQuest rescue a warden and his only prisoner from beneath the ice cap. The prisoner escapes and reveals that he holds a deadly toxin which will be released unless the crew does as he says, which is launching the seaQuest's missiles against the UEO.
When Krieg brings back what he believes is a priceless gem, greed runs amok on the seaQuest. No one listens to his stories of sea monsters in the area, until one attacks the seaQuest.
The seaQuest discovers a group of children living in an old munitions facility on the sea floor and they must evacuate them before the structure collapses and unleashes a deadly explosion. Meanwhile, Lucas develops a crush on the teenage girl.
When a small team from seaQuest board a ancient sunken ship in order to determine why it went down, they find themselves trapped in a series of very bizarre and supernatural events.
A hurricane threatens to prevent the rescue of a French sightseeing submarine which is stuck in a freshwater sink hole and running out of oxygen. When a team from the seaQuest are forced to the surface they must rely on each other to survive the storm.
When a vital component of seaQuest's air conditioning fails and regular channels fail, Krieg relies on a black market source called The Regulator. When Darwin disappears the seaQuest must track down the renegade who is seeking the meaning of life.
seaQuest is hurriedly dispatched to rescue a crew returning from a manned mission to Mars when their space capsule crash lands in the Atlantic Ocean, but the president of an militarized Asian federation wants them too for his own reasons.
While in the middle of an special experiment when only a skeleton crew is aboard, seaQuest is boarded by a group of commandos who are quickly able to take control of the ship.
When a top-secret UEO project shows the approach of a catastrophic volcanic eruption, the crew of seaQuest must convince treasure seekers on the island to abandon their lifelong search or face certain death.
A renegade sub is sinking whaling ships, which are in themselves illegal and against their moral judgement, the crew of seaQuest must stop the sub from its mission. Meanwhile, Krieg is on a mission of his own: to have a cheeseburger, despite red meat being outlawed.
In the lead up to an important demonstration, Lucas is knocked unconscious and the Stinger, seaQuest's prototype high speed sub, is stolen.
A Serbo-Croat dictator takes Drs. Westphalen and Lansdowne hostage in order to gain entrance into seaQuest in the hopes of using the ship's technology to rehabilitate his autistic son.
At a summit conference, Lucas and group of UEO leaders are taken hostage, leaving the seaQuest crew to uncover a mysterious and complicated plot whilst searching for the hostages.
Ford accidentally stumbles onto a colony of genetically altered humans, adapted by a scientist to live underwater. Meanwhile, Lucas heads to a party on land where he thinks Juliana is waiting for him.
Things threaten to go terribly wrong when the seaQuest crew discovers a million-year old spaceship. Their only hope is Darwin being the key to bridging the communications gap.
When the crew of seaQuest are tricked into torpedoing a refugee ship containing Westphalen's daughter, Dr. Westphalen, Ford, and Shan are trapped trying to save her.
A brand new power plant which is set to supply energy to the whole world goes wrong and there is a danger of the polar ice caps melting. Bridger decides he must sacrifice the seaQuest in order to save the world. Meanwhile, Lucas has a reunion of sorts with his father.moreless