This episode was originally intended to be the Season Three premiere but Fox opted to begin the season with Rules of the Game (1996).
Quinn's double, Logan St. Claire, can track wormholes. At the end of the episode, Remmy asks if they will be running into her again. The show uses this very plot device in the second half of the season, as the Sliders pursue Colonel Angus Rickman.
In the opening sequence, Quinn Mallory leans down to check the railroad tracks for vibration. Quinn is played by Jerry O'Connell, who was in Stand By Me as a child. During a scene in Stand By Me, Wil Wheaton's character reaches down to check train tracks for vibration. In both scenes, he and his friends wind up running from an oncoming train.
At 26:02 Wade calls Arturo from the cellphone she takes out of her pocket. Unlikely that the mobile works in an alternate dimension. Imagine the roaming fee!