That is correct. Although the movie was also called "Les revenants," and was called "The Returned" for the British theatrical release and "They Came Back" for the DVD release. I saw a review of the American show from some outfit big enough to know better that said the American novel was based on the French show, but they were wrong. It's apparently just an astonishing coincidence that two projects with the same premise and the same title came along. Since the French movie never gained traction here (I never heard of it until the French TV show aired, and I'm more up on these things than most), I tend to believe the American author when he says he came up with it on his own.