Day the World Ended (1955)
A group of seven people fear they are the only survivors
of a near world ending H-bomb blast. Not only do they fear
the radiation, but also mutants in the surrounding hillside.
One of the group is already contaminated, but strangely poses
no real threat to the others. Just surviving the friction of
assorted personalities at close range is the sub-plot. Richard
Denning plays the hero. Mike Connors is close to the edge
playing a tough guy.