Cole loses his memory while trying to determine which life-force is contaminated.
After a face off, Cole retrieves a deadly weapon and locks Zin inside the alien vault for eternity.
Zin poses as a scientist to enter a government facility dealing with aliens.
Cole is on the trail of an alien who copies the most-notorious serial killers of Earth.
Cole infiltrates the Chicago mob as a hit man, then is expected to kill Detective Vic Bruno.
Cole goes under cover as a patient in an asylum to gain access to an alien who has taken over the body of another patient.
A bar customer is murdered while Mel, Cole, Detective Bruno and Nestov are stuck in the Watchfire during a major snowstorm.
Cole and Mel pose as a married couple at a relationship retreat where they suspect two Orsians are hiding.
A child who recovered from cancer and now has the power to heal is actually a Cirronian scientist.
Cole and Mel go under cover at an event held in an art gallery.
Cole helps an American Indian investigate the suspicious death of his grandson.
Zin frames Cole for murder, but Mel comes to his rescue.
Government alien hunters capture Cole while he attempts to release Kruce, an ally of Zin.
Cole and Mel are after an alien who took over the body of a 15-year-old boy and is luring homeless teens to his lair.
Cole transforms himself into Rod Archer, an ex-boyfriend of Mel's who disappeared two years earlier.
Zin's bodyguard enters the body of a German shepherd which has extraordinary strength.
An alien is spreading a deadly disease to women he seduces.
Nestov, an alien con man, turns to Cole when he realizes he has taken over the body of a kidnapper.
Cole tracks Raahm to the site of an alien crash in Roswell and the secret airbase where the wreckage is supposed to be hidden.
Cole tracks an Enixian drug dealer who peddles a form of alien ecstasy with deadly consequences for humans.
Cole (Adrian Paul), an alien, comes to Earth to track fugitives from his planet who have taken over the bodies of humans.