Sliders (1995)

S1E1 Pilot

In his basement lab, Quinn Mallory accidentally activates a portal to alternate realities. Eager to experiment, he brings in his colleague Wade Welles and his mentor, Professor Arturo. However, when Quinn overexerts the device, it unexpectedly pulls them all in, along with Rembrandt "Crying Man" Brown, who is passing by. They find themselves in a devastated world ravaged by environmental collapse and must navigate their way through dangers until the countdown timer runs out.