Gillian of the Spirits (S02E03)

During a slide, a lightning strike hits the vortex, causing the timer to malfunction and leaving Quinn stuck in the astral plane. Meanwhile, the rest of the Sliders find themselves in a realm dominated by 1950s technology, unaware of Quinn's plight. Desperate for assistance, Quinn reaches out to a girl who can perceive him, a young woman with a past of hearing voices. Together, they must navigate this strange world to find a way to reunite with the rest of the team and restore the timer.