This made-for-TV movie, inspired by the 1989 film Alien Nation (as well as the subsequent TV series adapted from it), follows the adventures of an unlikely pair of police detectives -- earthling Matt Sikes (Gary Graham) and assimilated alien "newcomer" George Francisco (Eric Pierpoint). When Sikes and Francisco are assigned to investigate the death of a "newcomer," Sikes is given a glimpse of the ugly side of the aliens' caste system, as Francisco turns up his nose at chasing the killer of an "Eeno" -- an alien trained to do the most menial labor aboard the cruisers used to transport alien slaves. Alien Nation: The Enemy Within also features Terri Treas, Michele Scarabelli, and Joe Lando.