Like the pod people themselves, there have been many numerous versions of INVASION OF THE BODY SNATCHERS, both remakes and ripoffs alike. There was the 1978 iteration from director Philip Kaufman (THE RIGHT STUFF) starring Donald Sutherland, Jeff Goldblum, Veronica Cartwright, and Leonard Nimoy — a worthy remake. Then there was Abel Ferrara's BODY SNATCHERS in 1993. And then in 2007 there was THE INVASION starring Nicole Kidman and Daniel Craig. But that was like a pod person of a pod person of a pod person at that point.
You can shorten the name and alter the basic plot, but Jack Finney's 1955 science fiction novel (simply titled «The Body Snatchers») will always be the spore for the idea. And it was Don Siegel's big screen sci-fi spectacle a year later that would visualize society's fears of «The Other» coming from an alien land to replace us all with emotionless clones. Sound familiar? It's no coincidence that the film came at the age of McCarthyism and The Second Red Scare and the fear of communism everywhere. Some argue that inescapable commentary was intentional while others (star Kevin McCarthy and author Jack Finney themselves) claimed all along that was merely audiences reading into the film.
Like WAR OF THE WORLDS and THE DAY THE EARTH STOOD STILL, INVASION OF THE BODY SNATCHERS remains to this day one of the pinnacles of '50's sci-fi cinema.