Parasite

"Parasite," the 1982 science fiction horror film directed by Charles Band, follows Dr. Paul Dean (Robert Glaudini), a scientist in post-nuclear America who creates an uncontrollable deadly parasite after being forced to do so by the criminal organization known as the Merchants. With the help of Patricia Welles (Demi Moore) and Ricus's group of desperate delinquents, Paul must find a way to destroy the parasite while evading Merchant Wolf (James Davidson). Along the way, they team up with Collins (Al Fann), who helps them in their fight against the deadly creature.