Ellery Queen, Master Detective

A killer is cleaning up the streets of Milan by murdering those considered as deviant. An ornamental dragonfly, soaked in the blood of the victim, is left on each body.

Ellery Queen solves a mystery involving a valuable stamp.

Radio personalities Larry Abbot and Vickie Pearle are stars of a mystery show. Since they announced their engagement, Larry has been plagued by speech problems and, seeking out an unconventional cure, he returns to his boyhood home, a mansion in the countryside, bringing Vickie along. Larry reunites with numerous family members, but discovers that there are sinister things afoot within the walls of the creepy estate.

A drifter claims the money in an old bank account. Soon he finds himself the target of two men who turn out to be the sons of the man's old partner, who is now in prison because of a conflict with him over the money in that account.

A doctor is driven into an investigation of sinister goings-on at a horse race track by his mystery writer ex-wife.

Two dumb soda jerks dream of writing radio mysteries. When they try to pitch an idea at a radio station, they end up in the middle of a real murder when the station owner is killed during a broadcast.

Amateur sleuth Ellery Queen learns the truth about a businessman's two long-lost daughters.

A man is framed for embezzlement and runs off to San Francisco. His wife hires Ellery Queen to try and track him down before the police get to him.

The benefactor of the Stack Memorial Hospital dies after an operation. Ellery Queen investigates when it is revealed the cause of death was murder by strangulation.

Several days after one of his company's dams burst, ruining the life savings of several investors, a shady power company president is found stabbed to death. Ellery Queen gets to the bottom of the mystery.

When a murder occurs on an ocean liner docked in New York, the trail leads to Coney Island and a spy ring.