The Sliders slide into a Kromagg weapons-testing area and Maggie saves the life of the Kromagg commander, Kromanus. While Maggie tries to get the timer back from him, Quinn and Rembrandt discover a Kromagg weapon designed to eradicate humans.

Acid rain forces the Sliders to stay in the Chandler Hotel. Colin claims to have seen a ghost and the timer is mysteriously stolen.

The Sliders accidentally slide out with Maggie's double, leaving Maggie stranded on an American military base where deadly experiments are performed on pilots. Meanwhile, the Sliders arrive on a world that outlaws technology.

Colin is wounded on a Wild West Earth and separated from the others. While he is nursed back to health by a widow and her daughter, the others search for him and find an old foe.

After experiencing a rough slide, Rembrandt and Maggie see Colin is nowhere to be found. More disturbing, they meet a stranger claiming he is Quinn Mallory. Rembrandt and Maggie learn too late that this is all apart of an evil genius' desperate plan to save his life.

Diana tries using a university lab to find a way to separate Quinn and Mallory, which leads to her first encounter with her double, a struggling single mother. Meanwhile, Mallory experiences violent flashbacks from Quinn's life.

The Sliders arrive on a world where Maggie's double was a heroic astronaut and loved by the public. When she is mistaken for her double, the public gets excited. After being kidnapped by the mysterious Leader, Maggie is taken by the government where she must confront her father.

A malfunctioning timer deposits the Sliders underwater in the Pacific Ocean. A merchant ship picks them up, but is taking them out of their sliding radius and decreasing the likelihood of a safe slide. Their only chance is to join up with a pirate crew to get back to California.

The Sliders confront Dr. Geiger again, in a collapsing dimension full of innocent victims.