Season 4 - Episode Guide

After months of searching for Wade and Rembrandt, Quinn and Maggie (Jerry O'Connell, Kari Wuhrer) arrive on their home Earth---only to find it overrun by the Kromaggs.

The trio arrives on an Earth run by religious extremists, who extort followers for their possessions, promising passage to a nirvana world in return, a deal Quinn learns is a deadly sham.

Quinn, Maggie and Rembrandt arrive on an Earth used by the Kromaggs as a weapons-testing area, and are captured after Maggie saves the life of a Kromagg soldier.

After sliding onto a decrepit Earth, Maggie (Kari Wuhrer) becomes separated from Quinn and Rembrandt and is subjected to a virtual-reality device used to search her mind for slider technology.

Quinn meets his double in an alternate dimension where his experiments resulted in the wholesale transportation of humanity to another Earth, which is straining under the weight of the two populations.

Quinn discovers his brother Colin (Charlie O'Connell)---a bright, naive young man---who joins the team and becomes involved with women who plan to steal a wealthy man's frozen body in order to claim his money.

Upon arrival on an Earth where drug use is mandatory, Maggie and Colin (Kari Wuhrer, Charlie O'Connell) are dosed with chemicals and induced to stay on their new world.

When the group arrives on an Earth decimated by acid rain, they escape the weather by checking into a version of the Chandler Hotel plagued by paranormal activity.

Quinn and Colin devise a way to slide to their Earth, but the group winds up trapped in a security zone in the midst of a bitter civil war between Kromagg and human refugees.

Rembrandt falls for a doctor who may hold the key to saving Quinn's life. Trouble is, Maggie discovers the woman is a Kromagg collaborator on the run from the British.

The group arrives on an Earth where California has been taken over by racists, who capture Rembrandt and place him in a prison camp used to turn non-whites into faceless slaves.

After the group arrives on an Earth where Kromagg warriors are trained to kill humans, Quinn tries to persuade a woman to help free Colin, who has been captured.

The gang is separated during a slide to a parallel Earth, where a tabloid-TV show offers their only hope of a reunion. Also, Colin is mistaken for his counterpart and is betrothed to a woman as part of a business deal.

A woman and her half-Kromagg son join the gang as they travel to her home Earth, where an anti-Kromagg virus may prove deadly to the newborn.

The gang arrives on an Earth divided between computer-hackers and computer-lackers, and battles ruthless scavengers to unite a couple who fell in love on-line.

Maggie is stranded on a militaristic Earth when her double, a cyber-enhanced pilot, leaps with the others to a world that outlaws technology.

The gang is transported to an Earth where the inhabitants live as computer data run by a nefarious programmer, who deletes the rebellious Maggie from the system.

The gang squares off against an old foe in a retro Earth frontier town after Colin is wounded and left for dead following a stagecoach ambush.

The gang travels to an Earth where clones are used to replace body parts and when Quinn is mistaken for the clone of his blinded counterpart, he is expected to donate his eyes.

The gang arrives on a seemingly tranquil Earth that owes its serenity to chosen inhabitants who are brainwashed into sacrificing themselves by disappearing into a mysterious chasm in order to maintain their community's emotional well-being.

A glitch in their slide leaves Maggie's and Quinn's souls split between dimensions, and as their health in one world deteriorates, they live an entire life together in another. Meanwhile, Colin and Rembrandt must trust a mysterious man to keep their friends from dying.

An enigmatic science-fiction writer's novels have passages that seem to describe slider technology, and there's a reason: the man claims to know the Mallorys' parents.