Episode 1 - The Case of the Lonely People

Episode 2 - The Case of the Still Waters

A young Federal agent infiltrates a gang of bootleggers whose still is on board a freighter ship.

Episode 3 - The Case of the Gentleman Cheat

As part of his settlement with the IRS, a tax cheat agrees to pay all the money he owes within ten days. However, a suspicious IRS agent believes that the man is going to pay his taxes with yet more money that he has illegally hidden from the government, and sets out to prove his case.

Episode 4 - The Case of the Tarnished Lady

Episode 5 - The Case of the Man Outside

Some ingenious convicts working in a prison's print shop have begun a counterfeiting operation. The shop's foreman is deliberately looking the other way because he's up for parole in two months and wants to stay "clean."

Episode 6 - The Case of the One Way Ride

Episode 7 - The Case of the Little Tin Box

Three people who own a nightclub, where much of the business is on a strictly cash basis, decide to avoid paying income taxes by skimming money from the club.

Episode 8 - The Case of the Green Feathers

Customs agents go after a ring of gangsters who are smuggling rare parrots into the U.S. from Mexico.

Episode 9 - The Case of the Dangerous Dollars

Episode 10 - The Case of the Escaped Convict

Episode 11 - The Case of the Losing Gamble

A racehorse owner proves too clever for his own good. His doctored tax returns are filled with phoney deductions, attracting the attention of the T-men.

Episode 12 - The Case of the Bad Bargain

A Treasury agent goes undercover at an East Coast port to break up an opium smuggling ring.

Episode 13 - The Case of the Broken Bond

Frank Shelby, ailing from heart disease, breaks into a hone at the insistence of his wife and steals government bonds that he signs the names of the recipient to and then cashes himself, thereby pocketing the stolen money.

Episode 14 - The Case of the Careless Murder

Episode 15 - The Case of the Chartered Chiseler

A bus-company owner decides to keep a little extra money for himself by falsely reporting charitable donations as tax deductions. In a case of "poetic justice", he is carried to a Federal penitentiary in one of his own vehicles.

Episode 16 - The Case of the Iron Curtain

A heartless American criminal sees an opportunity to take the troubles of a shaken Holocaust survivor and turn them to his own advantage. He violates the Neutrality Act and ships airplane parts to France for sale to a country behind the Iron Curtain.

Episode 17 - The Case of the Unfair Verdict

Episode 18 - The Case of the Fatal Error

Barney is an old-time gangster who's quickly losing his grip on reality. He leads his gang back into bootlegging, convinced that the prohibition days are still in effect.

Episode 19 - The Case of the Elder Brother

Episode 20 - The Case of the Princely Pauper

Although the feds know that an importer is smuggling expensive Swiss jewelry into the US, they can't discover how he's doing it, despite his being under constant surveillance. They begin an undercover operation, hoping to discover his methods.

Episode 21 - The Case of the Swindler's Gold

Episode 22 - The Case of the Perfect Crime

Episode 23 - The Case of the Lady in Hiding

Episode 24 - The Case of the Tight Squeeze

Customs agents discover large quantities of expensive--and undeclared--Cuban perfumes that are flooding the market. They soon discover a criminal ring that has a clever plan for smuggling the goods from Cuba into the US.

Episode 25 - The Case of the Deadly Dilemma

Undercover agent Frank Ames poses as a small-time hoodlum and gets himself hired by racketeer Herb Kerry. His mission is to uncover information on the criminal's counterfeiting operation. Kerry gets suspicious because of all the questions Ames asks and gives him a job to prove he's not a cop: to carry out a "hit".

Episode 26 - The Case of the Black Sheep

After becoming interested in mobster's girl, the son of a sugar distributor gets hooked up with a gang selling illegal liquor.

Episode 27 - The Case of the Buried Treasure

Paul Lacosta buries his profit from running a gambling den in the backyard to avoid paying taxes. After five years of incessant haranguing from his wife, he digs up the bills to find they've molded. Against his better judgement, they begin to spend the bills they salvaged which tips off authorities.

Episode 28 - The Case of the Smuggled Heroin

Episode 29 - The Case of the Steady Hand

Episode 30 - The Case of the Only Son

Episode 31 - The Case of the Man Next Door

A somewhat nosy landlady begins to suspect that one of her tenants may be a dangerous loan shark.

Episode 32 - The Case of the Stolen Watches

Episode 33 - The Case of the Man Trap

The Secret Service is onto counterfeiter Russ Bagley who's working for a major crime syndicate. The agency's anonymous tip comes from Russ' girlfriend who's carrying on an affair with Russ' right-hand man, Nick. They figure that if they get him out of the way, they'll be free to carry on their romance and Nick will be promoted by the mob.

Episode 34 - The Case of the Ready Guns

Ben Adams picks up his younger brother, Harry, from prison after a four year sentence and gives him a job in his metal shop. Harry, though, has no intention of "going straight." He hooks up with an old criminal buddy who's heisted five cases of semi-automatics and converts them into fully automatic rifles to sell to mobsters.

Episode 35 - The Case of the Perfect Gentleman

An enterprising crook, who wishes to improve his lot in life, lavishes jewelry on a French female opera singer.

Episode 36 - The Case of the Shot in the Dark

Dangerous criminal Vince Sanderson visits his estranged wife Laura who he abused leaving her with a scar. The treasury men set a trap to capture the low life but endangering the beleaguered spouse.

Episode 37 - The Case of the Betrayed Artist

Episode 38 - The Case of the Frightened Man

Episode 39 - The Case of the Slippery Eel

Episode 99 - The Case of the Fatal Error