Fred, George, Doug and Howie are quickly reaching middle-age. Three of them are married, only Fred is still a bachelor. They want something different than their ordinary marriages, children and TV-dinners. In secret, they get themselves an apartment with a beautiful young woman, Kathy, for romantic rendezvous. But Kathy does not tell them that she is a sociology student researching the sexual life of the white middle-class male.

An American agent is assigned to track down a renegade Soviet spy who is building an atomic device in Los Angeles and plans to destroy the city with it.

Marine veteran Johnny Christopher meets and is immediately drawn to beautiful Evelyn Smith one day on the beach. Evelyn's new job as secretary to a U.S. senator in California soon brings unexpected intrigue and trouble for her and Johnny. The machinations of a sinister group of Nazi spies lead to mysteries and mistaken identities, and the two soon find themselves framed for murder!

US Marshall Vance is assigned to rid the Oklahoma Territory of outlaws.

Bat Masterson's old friend Billy Burns convinces him to become marshal of Liberal, Kansas and help the residents fight drought and a destructive range war.

A private detective foils the plans of villains attempting to take over Panamanian oil fields while he searches for a valuable map hidden in plain sight.

Dick is faced with a series of brutal murders in which the victims, all from different social and economic backgrounds, are viciously slashed to pieces. Suspects abound but Tracy, getting a clue that there will be 15 murders in all, must find the common thread among the victims before more are killed.

Two actors who play detectives on the radio find themselves investigating a real crime masterminded by an arch-criminal named the Cobra.

A police detective uses his girlfriend to track down a homicidal maniac.

Just as Nevada wins $7000 in yellowback bills, Ben Ide takes his $7000 and heads out to buy mining equipment. Burridge has his man Powell kill Ide and retrieve the money and Nevada finds Ide just as the posse arrives. Found with the money Nevada is arrested and Burridge now gets Powell to incite the local citizens to lynch Nevada.