The team uncovers many of the mysteries surrounding Mutant X after the Dominion captures Lexa and Jesse.

Lexa's suspicions lead Mutant X to unveil a traveling death camp, which is posed as a circus for mutant refugees and Mutant X's enemy within the Dominion.

Brennan battles with a Guardian of the Prophecy to stop the late mutant Ashlocke's plan from beyond the grave of world domination.

Mutant X must stop a scientist from cloning women for use as slaves in his ultra-exclusive men's club.

When Jesse's life hangs in the balance, Brennan must connect to him and lead him through past memories they've shared in order to save his life.

Discovering that their teammate Lexa is the subject of a covert experiment that is controlling her, the Mutant X team hunts for the doctor responsible.

Mutant X unearths an old military experiment involving an age-reversal serum and is surprised to discover that Jesse's grandfather is one of the test subjects.

Brennan is forced to return to his criminal past when Mutant X discovers that his old partner is involved in stealing secrets from the Dominion

Mutant X tracks down a rogue scientist while Shalimar breaks away from the team to help Adam save the scientist and uncover the real bad guy.

As the Mutant X team fights to retrieve a formula hidden in a collection of artwork, Shalimar is given vital information from a mysterious source.

While Brennan and Shalimar investigate a mysterious plane crash, Lexa contemplates her future with the Mutant X team.

Brennan and the Mutant X team join forces with a time-traveling mutant to defuse a bomb threatening devastating consequences.

The Mutant X team learns about Lexa's estranged twin brother when he becomes the main target of an underground operation harvesting mutant organs.

A revenge-seeking cybernetic mutant uses his powers to overtake Sanctuary's security system in a malicious plot to destroy Mutant X.

Jesse is forced to reconnect with his former fiancée when the Mutant X team learns that her company is involved in the genetic manipulation of crops.

The Mutant X team embarks on a mission to locate and capture a powerful super-mutant who possesses god-like powers.

The Mutant X team is called in to investigate bizarre activities occurring at a local hospital.

When Lexa is unknowingly drugged with a lethal substance, the team must race to find the antidote before it's too late.

The Mutant X team must stop a serial killer who leaves clues to his next victims in the form of puzzles.

The Mutant X team is brought in to help a military base that has become infected with a deadly disease.

The Mutant X team must stop the auction of a highly lethal substance that a number of notorious international terrorists are vying to acquire.

The surviving members of Mutant X emerge from a deadly explosion to meet the beautiful and mysterious Lexa, who makes them begin to question fundamental assumptions about their world.