An imaginative boy who frequently makes things up witnesses a murder, but can't get his parents or the police to believe him. The only people taking him seriously are the killers - who live upstairs, know that he saw what they did, and are out to permanently silence him.

An attorney defends a hoodlum of murder, using the oppressiveness of the slums to appeal to the court.

A gang of criminals, which includes a piano player and an imposing former convict known as 'Gruesome', has found out about a scientist's secret formula for a gas that temporarily paralyzes anyone who breathes it. When Gruesome accidentally inhales some of the gas and passes out, the police think he is dead and take him to the morgue, where he later revives and escapes. This puzzling incident attracts the interest of Dick Tracy, and when the criminals later use the gas to rob a bank, Tracy realizes that he must devote his entire attention to stopping them.

A private detective foils the plans of villains attempting to take over Panamanian oilfields when he hides a valuable map in plain sight.

An Australian nurse discovers an effective new treatment for infantile paralysis, but experiences great difficulty in convincing doctors of the validity of her claims.

Art curator George Steele experiences a train wreck...which never happened. Is he cracking up, or the victim of a plot?