Outer Limits episodes are available on video and on DVD from Amazon.com
A CIA-hired assassin must infiltrate the crew of a crippled alien spacecraft and kill its bizarre-looking inhabitants. With the powers to literally transform himself into any disguise, he changes to look like one of the strange space creatures so he can accomplish his mission. But the Army suspects the agent (Robert Duvall) has become sympathetic of the aliens and may have defected. They may be right.
"The Chameleon" (1963)
Director: Gerd Oswald
Written by: Robert Towne, Joseph Stefano and Lou Morheim