In Las Vegas, the regenerated ex-con Jack Bruno works as taxi driver. During an UFO Convention at Planet Hollywood, the skeptical Jack picks up Dr. Alex Friedman, who will present a scientific lecture in the event. Then he is pressed by two henchmen of his former boss, the criminal Wolff, that wants to talk to him, but Jack does not want to return to the crime life. Jack fights and gets rid of them; out of the blue, he finds two teenagers on the backseat of his cab. They tell that they are siblings, Sara and Seth, and they need to travel to a location outside Las Vegas in the middle of nowhere. Meanwhile the government finds a spacecraft that...
Tia and her brother Tony have supernatural powers, can communicate and move things with the power of their mind alone. They arrive on Earth for a visit in Los Angeles. When Tony uses his powers to prevent an accident, he gets into the hands of Dr. Gannon, a ruthless scientist who's constantly striving for power over the world. He puts him a device into the brain that allows him to control Tony's will. Tia gets help from a kids gang to free Tony and save the Earth.
Admiral James T. Kirk is still in charge of a space fleet, but from behind a desk. Dr. McCoy and Mr. Spock convince him to take on a mission which sounds simple, but with the appearance of the mysterious Khan, things get a little tricky.
Tia and Tony are two orphaned youngsters with extraordinary powers. Lucas Deranian poses as their uncle in order to get the kids into the clutches of Deranian's megalomanical boss, evil millionaire Aristotle Bolt, who wants to exploit them. Jason, a cynical widower, helps Tia and Tony "escape to witch mountain," while at the same time Tia and Tony help Jason escape the pain of the loss of his wife.