Richard Matheson's "I Am Legend" spawned three movies for three well known actors,; Vincent Price was "The Last Man on Earth," Charlton Heston was "The Omega Man" and Will Smith became "I Am Legend" a few years ago. The plat remains the same, a man lives alone in a city after a pandemic destroyed humanity. The only thing that survives are vampires that come out at night.
While a bit drawn out, the Vincent Price version is a moody contemplation. Unlike Charlton Heston's interpetation as a mercenary-for-hire, Vincent Price's character is an erudite man who lost the sensual pleasures of life. The Vincent Price protagonist has brecome a grubby hermit and his performance is fascinating.
"The Last Man on earth" is a must see for horror mavens. Richard Matheson's novel laid the ground work for george romero's current apocalyptic zombies, living dead and the dead.