Sliders - Season 2 - Eps 3: Gillian of the Spirits
A lightning bolt strikes the vortex during a slide, damaging the timer and trapping Quinn on the astral plane. Now the Sliders are stranded on a world with 1950s technology and Quinn can not be seen by the others. He tries to get the help from the only one who can see or hear him, a girl that has a history of hearing voices.
About Sliders

Title: Sliders
First Air Date: 1995-03-22
Last Air Date: 2000-02-04
Status: Ended
Rating: 7.605/10 (from 437 votes)
Language: EN
Seasons: 6
Total Episodes: 87
Network: FOX Syfy
Genres: Action & Adventure, Sci-Fi & Fantasy
Production Companies: St. Clare Entertainment
Synopsis
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 Welles 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?
Cast

Cleavant Derricks
Rembrandt Brown

Kari Wuhrer
Maggie Beckett

Tembi Locke
Diana Davis

Robert Floyd
Quinn Mallory