The best Lester Dorr’s mystery movies

Young auto mechanic Dan Brady takes $20 from a cash register at work to go on a date with blonde femme fatale Vera Novak. Brady intends to put the money back before it is missed, but the garage's bookkeeper shows up earlier than scheduled. As Brady scrambles to cover evidence of his petty theft, he fast finds himself drawn into an ever worsening "quicksand" of crime.

A meat inspector sets out to rid his town of payoff deals affecting the quality of meat being sold to the public.

When a movie actor is shot and killed during production, the true feelings about the actor begin to surface. As the studio heads worry about negative publicity, one of the writers tags along as the killing is investigated and clues begin to surface.

Val takes the assistance of a society reporter and a journalist to investigate the disappearance of her half-sister Arlene, a wealthy socialite who is involved in criminal activities.

In order to win back his girlfriend, Mike Shayne promises to give up his detective practice and get a job as riveter in an aircraft plant. He quickly finds himself investigating the theft of industrial diamonds from the plant's safe and, utilizing a variety of false identities, traces them first to a dress factory and later to a Hawaii-bound ocean liner. Escaping several attempts on his life, he is able to uncover a Nazi smuggling ring, but the location of the missing diamonds continues to elude him.

Chicago is gripped by an Axe Murderer. The streets are empty at night as there has been six murders and six people have been caught, but they are lunatics. Only one person has lived to tell about it, Edwina, who is as dumb as a brick. If it were not for Oliver, she would be number seven. When there is a second attempt on Edwina, Oliver figures that the crimes are not random and that someone is hypnotizing these people to do his bidding, but the police and Edwina are skeptical.

A young lawyer is determined to identify who is murdering members of a wealthy New York publishing family.

The Saint Takes Over, released in 1940 by RKO Pictures, was the fifth motion picture featuring the adventures of Simon Templar, a.k.a. "The Saint" the Robin Hood-inspired crimefighter created by Leslie Charteris. George Sanders returned as Templar, with Wendy Barrie playing his latest romantic conquest in her second of three appearances in the Saint film series (playing a different role each time). This film focuses on the character of Inspector Henry Farnack (Jonathan Hale), who appeared in several of the Saint series. When Farnack is framed by a gang he is investigating, it is up to The Saint to clear his name.

All work and no play makes Mr. Moto a busy detective! Mr. Moto heads to Egypt to thwart a criminal mastermind determined to steal the priceless crown of the Queen of Sheba. But the action heats up and the suspense soars when the precious treasure begins its perilous journey to America and Mr. Moto must race against time to unmask a cunning thief who will stop at nothing—not even murder—to get what he wants!

A New York City newspaper is sued for libel after reporting the wrong verdict in a murder trial.

It is the Christmas Holidays and reformed thief, Boston Blackie goes to Castle Theater to pick up players who will perform for prisoners that are still in prison. He takes a girl with him who has a brother already in prison. She has visited the prison twice in the month, so is not suppose to visit again. However when the group is completed the girl is included as well as Inspector Farrady. One of the clowns in the show is kidnapped and replaced by a con who wants to get even with two ex-partners. Boston Blackie figures out that a con has replaced one of his clowns but is unable to stop him. Blackie's clothes are stolen and a murder is committed. Of course, the Inspector immediately suspects Blackie of being involved. Now it is Blackie's job to find the killer, exonerate himself and help the girl free her brother.

In Puerto Rico to investigate a glut of contraband diamonds that are flooding the world's jewel market, Mr. Moto and his sidekick, a wrestler, find themselves involved in murders by thrown daggers, the frame-up of an overstressed Army colonel, and a pirate gang led by an unknown boss who has inside knowledge of the ensuing investigation.

Ellery Queen sets out to solve a mystery involving a valuable stamp.

Joel and Garda Sloan, a husband and wife detective team, who also sell rare books in New York, take a vacation to Seaside City. At Seaside, Joel's pal, Mike Stevens is managing and preparing for their beauty pageant. Joel is made one of the judges plus he has invested $5,000 in it, to Garda's dismay. Eric Bartell, promoter, arrives to dupe Stevens. When Ed Connors, New York racketeer arrives, Bartell is mysteriously murdered. Joel and Garda set out to investigate the murder.

The latest assignment for respected detective Charlie Chan has come directly from the government and involves the disappearance of a scientist named Harper, who was working on an extremely important serum. When the scientist is killed, Chan must sort through all very likely suspects, including the man's sister and his butler.

A rare-book dealer (Robert Montgomery) and his wife (Rosalind Russell) tie murder to the theft of a Shakespeare manuscript.

Two American-army officers are working on a new type of machine-gun for anti-aircraft warfare, when one of them is murdered. The other vows to get the spies that are after the invention and avenge his friend's death.

FBI agent Mac Richards takes his girlfriend, Helen Phillips, to a world championship boxing match only to learn that the event has been canceled because the titleholder has been kidnapped. Mac is entrusted with the ransom money, but the kidnappers discover that his fellow agents have surrounded the train station locker where the money was to be dropped and order the champ's manager to have the money delivered by an usher to a different location. With Helen disguised as the usher and Mac driving a cab, the pair set off to deliver the money. The gang isn't taking any chances, though - they waylay the cab and take both the ransom money and Helen to their hideout. Now Mac and his fellow agents must rescue both the champ and his sweetheart before they come to harm.