If you're seeking classic science fiction look elsewhere. The film has mostly sub-par acting and a mediocre script. Its one redeeming factor is that it reflects the nuclear paranoia of the time. I vividly remember my mother repeatedly and hysterically exclaiming "we're going to war" during President Kennedy's address to the nation during the Cuban missile crisis. The frequent air raid drills, "duck and cover" and home bomb shelters were all government propaganda to assure a nervous populace that we could actually survive a nuclear missile strike. So the movie serves as an interesting historical marker, but it's only worth watching once every 50 years.