This one is an early vampire/zombie film; actually it's more like what is seen in today's zombie films. You see undead beings walking around killing and biting people, hoping they become one of them. That's the case in this movie starring Vincent Price.
Horror movie legend (and St. Louisan) Vincent Price stars as Dr. Robert Morgan, who is indeed the 'last man on Earth'. However, he does try to find any human survivors left, after something in the air plagues, well, the Earth. Morgan is immune from it, unlike the rest of his family. He even tries to befriend a dog, which also gets infected with the virus. It's all a depressing one, but worth watching.
It can be cited as 'the first zombie thriller', although I'm aware there are several of those type of flicks that came way before 1964. 'I Am Legend' with Will Smith is said to be a remake of this. I can agree.
My rating: 5 out of 10