In his basement in San Francisco, boy-genius Quinn Mallory unlocks the doorway to an infinite number of Earths. During a test run, Quinn invites co-worker Wade Wells and his teacher Professor Maximillian Arturo to see his new invention. But an increase in power and an early departure leave all three, plus a washed-up soul singer named Rembrandt "Crying Man" Brown, lost in a parallel world. Now they must "slide" from world to world, not only adapting to their changing surroundings, but also trying to get back to their world. Will they ever make it home?
When Dr. Alec Holland becomes the victim of deadly sabotage and is left for dead, he is transformed by the swamp and the chemicals meant to kill him into a creature struggling with the balance between his own vengeance and the protection of those who can't protect themselves.
In the not-too-distant future, various test subjects are held captive by mad scientists and evil villains aboard the Satellite of Love, where they are forced to watch cheesy B-grade movies with the help of their robot friends: Cambot, Gypsy, Tom Servo and Crow T. Robot.
Theorizing that one could time travel within his own lifetime, Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished... He woke to find himself trapped in the past, facing mirror images that were not his own and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so Dr. Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap will be the leap home.
"It began in the future. A time machine called TRAX, criminals who vanish, and a lawman who must pursue into the past. Now he is among us, a special breed of man. He has one weapon and a computer called Selma. With her, he will travel through our world, searching for fugitives from his own, knowing he cannot go home until he has found them all. His name is Darien Lambert, and this is his story."
"That was the scene in California's Mojave Desert five years ago - our historic first view of the Newcomers' ship. Theirs was a slave ship, carrying a quarter million beings bred to adapt and labour in any environment. But they'd washed ashore on Earth, with no way to get back to where they came from. And in the last five years, the Newcomers have become the latest addition to the population of Los Angeles... "
The 21st century: mankind has colonized the last unexplored region on Earth; the ocean. But with newfound potential comes old-fashioned conflict and the United Earth Oceans Organization (U.E.O.) assigns the submarine, seaQuest DSV to keep the underwater peace and patrol the planet's final frontier. The captain of the seaQuest and its crew are its guardians, for beneath the surface lies the future.