A penny arcade owner is robbed and murdered. Suspision falls on a local peddler. But Ballinger thinks there is more to this case than anyone is admitting.

During a crack down on Chicago crime, Bugsy Page makes threats against the Attorney General Russel Madison. Ballinger needs to decide if the threats are real or simply an attempt to throw the man off.

Frank Ballinger becomes involved in a tense hostage situation, he must restrain his instinct to simply shoot it out because of fears their may be a young child involved.

A bail bondsman's son is kidnapped to force his father to post an $80,000 bond for the release of a murderous extortionist. Lieutenant Ballinger finds himself on a dangerous high-speed boat chase when the culprit attempts to avoid trial (and a likely death sentence) by escaping to Canada.

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M Squad hunts for a bomb before it blows up a hospital. Jonas Blecker, an embittered bank clerk who went to prison for dipping in the till to loan money to depositors down on their luck, wants to commemorate his 1st anniversary as a free man by killing the judge who gave him the maximum sentence. The judge is in Columbus Hospital for a delicate operation and he can't be moved.

When a well-liked retired couple is found brutally murdered, evidence points to their curmudgeonly neighbor. Lieutenant Ballinger is initially skeptical of his story, but thorough investigation reveals that things are not always as they seem.

Ballinger is called in to investigate when a burning car is found with the body of a young woman bound with wire inside. The chief suspect, playboy lawyer Paul Crater, seems to have an air tight alibi. Ballinger needs to cast his net wider to solve this mystery.

British racing car driver Morrison is killed in a local race. The driver's chief mechanic presents evidence to M Squad that indicated the car may have been tampered with before the accident.

During a robbery one of the criminals is hit in the eye and blinded. Ballinger has a fair idea who is behind the crime. Urgency increases when news comes through an eye specialist has been kidnapped.

The squad hunts down a cop killer.

Ballinger is part of an ongoing investigation into racketeering in the night club industry. After a fight breaks out in a club, Ballinger thinks he might have the break he has been looking for.

Conrad Brenner is found dead in an apparent suicide. As Ballinger continues the investigation it becomes evident that he's actually been murdered, when a personal diary can't be found, Ballinger realizes the truth of the case.

Ballinger is working a jewelry theft when he becomes convinced one of thieves is a clean skin amateur. He realizes by putting pressure on this individual he has a chance to crack the entire racket open.

Lieutenant Ballinger and the FBI have few leads and little time to find a kidnapped socialite with a predilection for visiting jazz clubs. Bound, unattended, and hidden in a condemned building during a cruel Chicago winter, the young woman is in grave danger of dying from injury or exposure before she can be rescued.

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The M squad is called in after a series of factory fires occur in the Chicago area. The case become complex after the unusual chemical signature of the fire accelerants is identified.

Used car salesman Larry Colman has argument with Art Brunswick, a man who claims to the be the father of Colman's daughter. Colman unearths evidence Brunswick is not who he claims to be leading to a deadly altercation.

Ballinger is brought in when a robbery and murder occurs at an armory. He is puzzled by the list of weapons stolen including a bazooka and other heavy weapons. He knows they cant sell the weapons, so what is their plan?

Ballinger is on a case involving threats against a visiting prince to Chicago. Mo one is taking the situation too seriously until a little girl accidentally finds the detonating device for a home made bomb.

Lieutenant Ballinger works to solve a series of armed holdups as a means toward the capture of shotgun-wielding Ma Phelan, who murdered a detective while helping her son Pete escape from police custody.

Willy Nichols is due to testify in a narcotics investigation, although under police protection he receives a threatening phone call and suddenly disappears. Ballinger must find Nichols to save the case.

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Lieutenant Ballinger investigates a possible link between a series of Dark Street purse snatchings and the disappearance of a successful but unhappily married architect.

The M Squad become involved when a bank manager laundering illegal money is killed. The situation becomes tangled when a young lady accompanying the bank manager comes forward.