Not of This Earth (1957)

Synopsis
One of Roger Corman's finest science-fiction endeavors of the 1950s, Not of This Earth is an excellent film by any standards. Paul Birch stars as Johnson, a taciturn gentleman in a dark business suit who hires nurse Nadine (Beverly Garland) to care for him. Curious that Johnson needs constant blood transfusions, Dr. Rochelle (William Roerick), Nadine's boss, discovers to his horror that Johnson has no blood of his own! Before he can make this information public, Rochelle is telepathically enslaved by the emotionless Johnson. It soon develops that Johnson is a space alien, sent from his home planet to see if the blood of earthlings can be used by his dying race -- the first step in their ultimate takeover of the world. The scenes involving hyperkinetic vacuum salesman Piper (Dick Miller) are the film's highlights, simultaneously hilarious and horrifying. Originally released on a double bill with Attack of the Crab Monsters, Not of This Earth was indifferently remade twice, in 1988 and 1996. ~ Hal Erickson, All Movie Guide