As the fifth season begins, Renee desperately searches for Liam and unwittingly unearths the Atavus, a deadly new race of aliens intent on destroying humanity.

While Sandoval strikes a deal with the Atavus, Renee desperately tries to convince Hubble Urick about the existence of the deadly aliens.

Renee fights to destroy the Atavus as they begin a "joining" process that will create Human Atavan hybrids.

Renee joins forces with a down-and-out former reporter in order to convince the media of the existence of the Atavus.

Sandoval resurrects William Boone in an attempt to lure Renee into Howlyn's trap.

Renee releases Dr. Mataros, a convicted serial killer, from death row in a desperate attempt to find a way to kill the Atavus.

Renee (Jayne Heitmeyer) tries to sabotage Sandoval and Howlyn's plans for mass-producing Atavus regeneration chambers.

William Boone faces an enemy from the past when Sandoval brings Zo'or back to life as an Atavus.

Love is both blind and deadly for J Street, who finds herself attracted to a seductive Atavus.

Renee travels back through time in pursuit of a deadly female Atavus.

Renee and Street check into a spa for some rest and relaxation, but find themselves in a life and death struggle with an Atavus.

A high school student becomes a hybrid pawn for the Atavus after starting an Atavus Fan Club web site.

A hybrid-infested hospital uses comatose patients as a food source for the Atavus.

Juda's death spells hope for Renee in her battle against the Atavus.

Renee and a rogue archeologist search the Pyramids for a tomb that may contain an ancient Atavus.

Renee tries to save a friend trapped within a top-secret prison for hybrids.

Renee and Lt. Michaels set out on a mission to destroy the Mothership's weaponry system.

Renee tries to prevent Howlyn's son from following in his father's footsteps.

A vigilante group puts Renee on trial for opening the original Atavas stasis chamber.

Renee races to acquire an antidote for Street, who has become an Atavus hybrid.

Renee and Captain Michaels discover a hybrid vaccine facility is actually being used to breed deadly Atavus.

An old friend returns to aid Renee in her Final Conflict with the Atavus.