1956年上映的科幻恐怖片《天外魔花》(Invasion of the Body Snatchers)是很多影迷心中的絕對經典,這部B級片擁有精彩的劇情,同時也隱含對麥卡錫主義的諷刺。《天外魔花》改編自科幻小說《人體入侵者》(The Body Snatchers),由唐·希格爾(Don Siegel)、凱文·麥卡錫(Kevin McCarthy)主演。
Dr Miles Bennel returns his small town practice to find several of his patients suffering the paranoid delusion that their friends or relatives are impostors. He is initially sceptical, especially when the alleged dopplegangers are able to answer detailed questions about their victim's life, but he is eventually persuaded that something odd has happened, and determines to find out what. This film can be seen as a paranoid 1950s warning against those Damn Commies, or conversely as a metaphor for the tyranny of McCarthy-ism (or the totalitarian system of Your Choice) and has a pro- and epilogue forced upon Siegel by the studio to "lighten the tone".