There are four mutant classifications: Feral, Elemental, Molecular, and Psionic. Feral mutants had their DNA spliced with an animal whereas Elementals can channel environmental and/or elemental energy through their bodies. Molecular mutants have abilities which defy physical science such as invisibility, propulsion, chromatic (color), intangibility (move through solids), and so forth. Finally, Psionics possess heightened mental abilities. Common psionic types include: Illusionist, Telepathic, Precog, Telempathic, and Telekinetic.
The code names for the characters of the show before they were dropped because of legal action were "Fuse" for the electricity throwing Brennan, "Rapport" for the empath Emma, "Shadowfox" for the animal-like Shalimar and "Synergy" for the density changing Jesse.
In 2001, 20th Century Fox sued Marvel Entertainment, stating "Mutant X" violated Fox's film rights for X-Men (2000). As a result, several changes to the premise of the series were made to distance it from the movie and its comic-book source material. Originally, the "mutant" characters were to have worn black costumes and used codenames (just as in X-Men), and Adam was to have been a wealthy mutant with the surname of Xero (similar to Professor Xavier). The show's logo was also changed from its initial design, which featured the "X" behind the word "Mutant," which resembled the logo used in trailers and TV ads for X-Men (2000) ("X" behind "Men").
The Genomex headquarter is the same building complex just outside of Toronto, that is regularly used as homebase for "The Center" in The Pretender (1996) and in some episodes of _"Psi Factor: Chronicles of the Paranormal" (1996)_.
The bedrooms were created to reflect the characters' personalities and abilities. Brennan's room features martial arts figures, car and motorcycle models, scrolls, and climbing gear. Emma's room has a Zen quality, geometric designs, and incense. Shalimar's room features various animal prints, is extremely clean, and has no windows. It resembles a cat's liar. Jesse's room has a work desk with computer equipment, juggling balls, and numerous books. Brennan's comforter is green, Emma's is yellow, Shalimar's is leopard print, and Jesse's is a striped white, gray, and maroon.
Episodes 21 and 22 were broadcast out of order. "A Breed Apart" was promoted as the season 1 finale, and it was, but then a few weeks later "Dancing On The Razor" was broadcast finished off the 22 episode run. If you pay attention to the plot however "Dancing On The Edge" clearly is supposed to take place before the events of "A Breed Apart" because it has the character of Mason Eckhart still running Genomex, even though in "A Breed Apart" he was overthrown by Gabriel Ashlock.