A teenager is charged with murder and Maris' secretary urges him to take the case.

An ex-convict runs a gift shop and finds the dead body of a well known gangster in his shop. He is arrested for murder. Maris and Lt. Weston, who are friends of the accused, help in the investigation.

A rich oil man is the victim of the theft of his securities. His former employee is accused of the crime. Maris invesigates.

An ex-convict who has become emotionally unstable kidnaps Maris and his assistant because he blames Maris for his conviction.

Professor Hasting thinks his wife is too worried about the welfare of criminals and their concerns. He decides his wife needs a lesson in reality.

Joe Tanner is an ex-convict but is now reformed and leading a good life. The police, however, charge him with a crime. Tanner claims he is innocent. Maris investigates.

Sergent Corey is court martialed for murder. Lt. Weston believes in Sgt. Corey because he helped him get started in his military career. Maris helps in the investigation.

A psychologist, Dr. Von Heisinger, is murdered. The weapon: an arrow. Maris investigates.

Bill Donati, a laborer, is accused of killing a local racketeer named Al Curis. Maris defends Bill.

Maris receives an important clue from a young girl in an employment agency racket. Maris decides to investigate.

Mr. Burkhart, Sr. accuses his grandson George of stealing. He claims only the two of them knew the combination of the safe. Maris investigates the allegation.

A rehabilitated ex-convict is suspected of killing a policeman and is jailed. Maris comes to his defence.

In an attempt to find out more facts from a murder trial Maris uses psychiatry as a defence.

Fred Prescott, a news commentator, is murdered and Maris investigates.

A millionaire playboy is murdered and a girl is charged with the murder and sentenced to the electric chair. Maris belives the girl is innocent and investigates.

A supervisor at a zoo is poisoned and the zoologist is charged with murder.

Ed Reed's house burns down and a female friend is killed. Reed is accused of arson and murder and is jailed. Maris believes in Reed and investigates.

A prizefighter bets against himself in an upcoming fight. Maris becomes suspicious of his actions.

A policeman is charged for the murder of a bookie. The ones who are the likely suspects have an airtight cover story. Maris takes the case to help the policeman.

A man is convicted of murdering his former employer. His wife, Betty Nelson, comes to Maris and pleads that he investigate the case and have it re-opened.

A circus performer, whose forte is throwing the knife, is charged for the murder of another circus performer in a jealous fit of rage over his wife and arrested. Maris believes the circus performer is innocent.

Sam Putman is charged with arson. Maris investigates and defends Mr. Putman since he is an old friend of his father.

A woman is charged and jailed for the murder of her husband. Her step-daughter, Jennifer, asks Maris to investigate the case because she believes in her step-mother. Jennifer turns out to be quite a sleuth and help Maris with the case.

Frank is an ex-convict who is going straight and is now the son-in-law of a policeman. Two of Frank's old friends commit a robbery and Frank is jailed. Maris tries to help but a few surprises come his way.

A soldier is accused of killing another soldier in a brawl over a woman. Maris is called in to help the accused soldier and clothes play an important role in the defence.