The Outer Limits: Season 1, Episode 31
1 - 31: The Chameleon
A government assassin is given a unique assignment: undergo alien DNA grafts to "become" an alien, infiltrate their ship which crashed on Earth, and find out if they pose a threat.
A government assassin is given a unique assignment: undergo alien DNA grafts to "become" an alien, infiltrate their ship which crashed on Earth, and find out if they pose a threat.