A man's campaign to prove his estranged wife an unfit mother is interrupted when he's arrested for murder.

Mason is caught in the middle when a romance develops between two members of rival political families.

Mona Harvey is the principal stockholder in a publishing company run by her uncle, Everett, and the wife of an eccentric sculptor named Hannibal Harvey who is being blackmailed. Unable to get at any money due to Mona's absence, Hannibal has ditzy model Bonnie Dunbar write a blackmail note to Mona's uncle. Everett gets the money out of petty cash and sends it to Bonnie. In the meantime, Mona returns, finds Bonnie's blackmail note, and decides to pay the model a visit. So does Hannibal. Without seeing each other, husband and wife both discover Bonnie's dead body. Mona gets arrested for the murder but she fears that Hannibal might be the real killer.

Abner Gordon threatens to press charges if his niece doesn't replace the money she lifted from his safe.

A recently widowed women becomes tangled in a web of suspicion when she hastily remarries.

Mason is summoned when Harvey Scott's efforts to retain temporary control of the family mining company lead to murder.

Attorney Joe Kelly agrees to represent Bill Jarvis, whose mother-in-law is trying to have his bowling alley shut down.

In an offbeat case, Mason becomes involved in international intrigue wheh he travels to Switzerland to meet a friend's future daughter-in-law.

Investigating the "other woman" in a betrothed man's life, Mason finds himself neck-deep in a murder mystery.

Reba Burgess's control of her late husband's mining company is threatened when a man turns up with a partnership agreement—signed by Burgess before he died.

An investment broker tops off a series of peculiar actions by commandeering a taxi to rob a bank.

Drake gets more than he bargained for when he agrees to act as courier in the sale of a rare Confederate coin.

A model fails to read the fine print when she signs a curious contract paying her $200 a week to gain weight for an assignment.

The foundations of a large company are shaken when the chief engineer uncovers evidence of budget tampering.

Uninterested in her recently inherited fortune, an aspring singer is easy prey for a sinister agent.

Attorney Ken Kramer comes to the aid of an alleged thief accused of stealing a $50,000 necklace.

A woman hires Mason to nullify a clause in her late husband's will that disinherits her if she reopens the investigation of her son's death.

Balancing private investigation with legal gymnastics, Mason tries to iron out a case of embezzlement and murder.

In Hawaii to handle an investigation for a hotel chain, Mason and Drake uncover a murder.

A woman turns to Mason when she becomes convinced that her boss is planning to murder his invalid wife.

Burger tries to head off trouble when his young assistant falls for an unscrupulous woman.

Paulo Porro is a charming young man from Sicily with a clever scam for ingratiating himself with Italian-American families. But when he tries his charms on Enrico Bacio, Paulo runs into a problem. It seems as though there was bad blood between the Porro and Bacio clans back in Sicily. Bacio even believes that Paolo has come to kill him. When Bacio is later found with a file lodged in his neck, Paolo is blamed for the murder.

Former swimming champion Victoria Dawn is now overweight, out of shape, and the owner of a chain of failing health spas. Desperate to regain some of her former glory she hires young actress Regina "Reggie" Lambert to impersonate her in a swim across the Catalina Channel to Los Angeles.

Franklin Shore, supposedly dead for 10 years, telephones his niece, Helen, and gives her instructions on how to meet him. Then someone takes a shot at Helen's boyfriend and attempts to poison the "deceased's" wife, Matilda.

Police detective Danny Talbert's father dies from a heart attack caused by stress from the fact that he was into mobster Steve Radom for a $10,000 debt. Or so Danny believes. When Radom is killed with Danny's gun, Perry steps in to clear his name.

Pete Warren's estranged wife, Myrna, is killing time in Reno waiting for their divorce to go through. When Myrna gets involved in a counterfeit gambling chip scam, Pete makes the mistake of lying to protect her.

An unsuccessful salesman has a lot of explaining to do when he throws down his sample case in disgust—and large sums of money fall out.

Della buys the diary of a drowned woman at an auction and after reading the entries becomes convinced that the woman's death was not a suicide as was ruled at the time. This leads Perry into a case involving an eccentric millionaire, his two scheming assistants, and a kleptomaniac gorilla.

Perry is paid a visit by a Dorrie Ambler who wants him to verify her identity. Shady private eye Phil Arthur has been paying her to frequent certain places around town and Dorrie thinks it's because she bears a strong resemblance to madcap heiress Minerva Minden. After some digging, Perry finds out that Minerva might have been involved in a hit-and-run accident and it appears as though Dorrie is being used to prove that.