Two federal agents do not believe an atomic-bomb threat is just another war game.

Pat Garrett arrives in Abilene where he catches five of Butch Cassidy's gang. He calls in Wyatt Earp and Bat Masterson and they learn there is a half million dollar shipment of money arriving by train and Cassidy is amassing enough men to take it.

An outlaw terrorizes the citizens of Gunsight Pass while he searches for stolen bank money that mysteriously disappeared after a robbery.

With his assistant, Laura Hutchinson, Dr. David Conway develops a device to advance the fledgling science of earthquake prediction. After forecasting a large trembleor that will rock California within twenty-four hours, Conway cannot persuade the Governor to act. When the prediction proves true and further tests indicate that there are more quakes to come, Conway and Laura seek to perfect their device. Subsequent tests deep within Carlsbad Caverns discover an unknown element—E-112—that is responsible for the earthquakes and threatens to destroy the globe if it ever reaches the surface. The team determines that with only four weeks until Armageddon, the race is on to neutralize the killer element before it takes a devastating toll.

Fed up with the raising crime in Miami, the police chief and the leading members of the city council hire a former Miami gangster, gone straight, to help eliminate the biggest crime syndicate in the city.

The arrival in a small mountain town of a dissheveled stranger launches a series of murders committed by some sort of animal. As the town doctor and his daughter attempt to help the stranger, the sheriff investigates the murders; and they uncover a sinister experiment involving two rogue scientists, a car accident victim, his wife and children, and a serum that causes a man to turn into a ravaging werewolf.

A police detective baits killer gamblers with a mob witness (Patricia Medina) in the Everglades.

Gus Linden, former racketeer head of a Detroit local of the United Automobile Workers of America, A.F.L, attempts to destroy his successor, Blair Vicker, so he can put his old rackets back into the auto factories. Vickers fights him off, ultimately winning help from Linden's attractive daughter Barbara and from Joni Calvin, Vickers' moll.

Rock-and-roller Arnie Haynes returns to his hometown as a hero to the teenagers. However, the mayor and other concerned adults have banned him from performing in his hometown because they consider him and his music a negative influence on the youth. But with the help of disc jockey/publicist Alan Freed and fellow artists (including Bill Haley and the Comets and Little Richard), they hope to convince everyone that rock and roll is not as dangerous as the adults think.

An ex-military accountant is recruited by the FBI to infiltrate the mob in Chicago in an attempt to break open the rackets. To complicate his job, two women stand in his way, each with their own agenda.