Battlestar Galactica (1978)

Opening Narration: (Used on the video version of "Saga of a Star World") "There are those who believe... that life here... began out there. Far across the universe. With tribes of humans... who may have been the forefathers of the Egyptians... or the Toltecs... or the Mayans... that they may have been the architects of the Great Pyramids... or the lost civilizations of Lemuria... or...

Quantum Leap

"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...

Sliders

"What if you could find brand new worlds right here on Earth, where anything is possible: same planet, different dimension? I found the gateway!" 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...