Day the World Ended-Paul Birch, Mike Connors-1955 IMDB 5.4/10

After a nuclear war, an unlikely group of people, including a rancher, a geologist, a crook and his girlfriend, find themselves trapped in the middle of nowhere while battling an ugly mutant created by Paul Blaisdell. The geologist and the crook also find the time to fight over the rancher's daughter, while the moll fumes.