1Into the Moonless Night
In the aftermath of disaster, the Mutant X team must deal with the death of one of their teammates, the disappearance of another, the return of Mason Eckhart, and the arrival of a mysterious mutant with an agenda of her own.
2Wages of Sin
The Mutant X team must stop the auction of a highly lethal substance that a number of notorious international terrorists are vying to acquire.
3The Breed
The Mutant X team is brought in to help a military base that has become infected with a deadly disease.
4Where Evil Dwells
The Mutant X team must stop a serial killer who leaves clues to his next victims in the form of puzzles.
5The Taking of Crows
When Lexa is unknowingly drugged with a lethal substance, the team must race to find the antidote before it's too late.
6Shadows of Darkness
The Mutant X team is called in to investigate bizarre activities occurring at a local hospital.
7The Hand of God
The Mutant X team embarks on a mission to locate and capture a powerful super-mutant who possesses god-like powers.
8Wasteland
Jesse is forced to reconnect with his former fiancé when the Mutant X team learns that her company is involved in the genetic manipulation of crops.
9No Exit
A revenge-seeking cybernetic mutant uses his powers to overtake Sanctuary's security system in a plot to destroy Mutant X.
10Brother's Keeper
The Mutant X team learns about Lexa's estranged twin brother when he becomes the main target of an underground operation harvesting mutant organs.
11Possibilities
Brennan and the Mutant X team join forces with a time traveling mutant to diffuse a bomb threatening devastating consequences.
12Conspiracy Theory
While Brennan and Shalimar investigate a mysterious plane crash, Lexa contemplates her future with the Mutant X team.
13Art of Attraction
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
14A Normal Life
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.
15Divided Loyalties
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.
16Age of Innocence
Mutant X unearths an old military experiment involving an age-reversal serum and is surprised to discover that Jesse's grandfather is a one of the test subjects.
17She's Come Undone
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.
18In Between
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.
19Dream Lover
Mutant X must stop a scientist from cloning women for use as slaves in his ultra-exclusive men's club.
20The Prophecy
Brennan battles with a Guardian of the Prophecy to stop the late mutant Ashlocke's plan from beyond the grave of world domination.
21Cirque des Merveilles
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.
22The Assault
The team uncovers many of the mysteries surrounding Mutant X after the Dominion captures Lexa and Jesse.