A mutant terrorist, Kilohertz, threatens to throw the world into chaos.

A young New Mutant from Adams' past shows up, seeking revenge for her father's death.

Adam is the target of an assassination league. After their first failure, he sends Shalimar to infiltrate the group but the situation quickly becomes dangerous for her.

The team tracks down a pyromaniac mutant but matters are complicated when Emma is ""possessed"" by the spirit of his most recent victim.

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 called in to investigate bizarre activities occurring at a local hospital.

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

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.

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