A fraternal alternate of Quinn Mallory was a main character during the fifth and last season of the show Sliders

Sliders

Sliders is an American science fiction television series. It was broadcast for five seasons, beginning in 1995 and ending in 2000. The series follows a group of travelers as they use a wormhole to "slide" between different parallel universes. The show was created by Robert K. Weiss and Tracy Tormé...

played by Robert Floyd

Robert Floyd (actor)

Robert Floyd is a television and film actor. He is best known for his role as "Mallory" on the science fiction television show Sliders. He appeared in 18 episodes, airing from 1999 until 2000....

. This version of Quinn Mallory is usually just called Mallory but sometimes he is credited or referred to as Quinn2 or Quinn Mallory (2).

The Quinn

Quinn Mallory

Quinn R. Mallory is a fictional character on the science fiction television show Sliders, played by Jerry O'Connell.-Childhood:Quinn was born in 1973 and raised in San Francisco, California, the son of Michael and Amanda Mallory...

 from Earth Prime

Earth Prime (Sliders)

Earth Prime, a term used in the television show Sliders, is the name of the alternate Earth where the four original sliders started their journey. Although it is very similar to our Earth, the creator of the show, Tracy Tormé, has stated that it is not our Earth...

 was merged with this fraternal alternate of Quinn Mallory by Dr. Oberon Geiger as a science experiment. This version of Quinn Mallory, along with a scientist Dr. Diana Davis

Diana Davis

Dr. Diana Davis is a character from the fifth season of the science fiction show Sliders, played by Tembi Locke. She is a physicist with a PhD....

, joined the sliders (who were Rembrandt Brown

Rembrandt Brown

Rembrandt Lee Brown is a fictional character played by Cleavant Derricks on the science fiction television show Sliders. In 1994, Rembrandt was living in San Francisco. Rembrandt is a musician, whose stage name is The Crying Man because of his ability to "cry real tears" on stage...

 and Maggie Beckett

Maggie Beckett

Maggie A. Beckett is a fictional character on the television show Sliders, played by Kari Wührer. She was introduced in the episode "The Exodus, Part One" and was present in the last nine episodes of the third season, and the entire fourth and fifth seasons...

 at the time) in order to find a way to unmerge the two Quinns.

This Quinn Mallory is not a genius and not a scientist, as the Quinn Mallory who grew up on Earth Prime was. He was used as a guinea pig

Guinea pig

The guinea pig , also called the cavy, is a species of rodent belonging to the family Caviidae and the genus Cavia. Despite their common name, these animals are not in the pig family, nor are they from Guinea...

 for Dr. Geiger's experiments. Mallory had muscular dystrophy

Muscular dystrophy

Muscular dystrophy is a group of muscle diseases that weaken the musculoskeletal system and hamper locomotion. Muscular dystrophies are characterized by progressive skeletal muscle weakness, defects in muscle proteins, and the death of muscle cells and tissue.In the 1860s, descriptions of boys who...

 and lived in a wheelchair

Wheelchair

A wheelchair is a chair with wheels, designed to be a replacement for walking. The device comes in variations where it is propelled by motors or by the seated occupant turning the rear wheels by hand. Often there are handles behind the seat for someone else to do the pushing...

for a while, until Dr. Geiger cured him by extracting some DNA from an unaffected alternate of Quinn Mallory and merging it with Mallory.

Mallory never liked the other Quinn Mallory being merged inside of him and wanted him to be removed.