A hardened criminal, whose personality belies his viciousness, escapes from prison, killing a guard. Dan Mathews swings into action, and as the man commits one ruthless act after another to break through the trap closing in on him, it becomes apparent that there's almost a personal conflict between the two men - that ends only when they meet face to face in the final scene.

An expensive, giant computer, one of the twentieth century wonders, which does a tremendous amount of administrative work in just hours, is ingeniously 'kidnapped' from an electronics company by two men. The firm's owner is told to get $100,000 from his bank at two o'clock the next day and wait for instructions. A helicopter chase helps Dan stop the men from collecting the ransom or getting away.

Systematic traffic checks and increased patrols begin on a high accident freeway. Hoping to determine causes and cures, Dan questions drivers who get too many citations there. One man refuses to accept Dan's safety philosophy. When his license is suspended, his wife drives him to an important business meeting. En route, her eyeglasses break and he takes over at the wheel. Encountering a traffic check, he panics and flees, resulting in a severe accident in which his wife is critically injured. He learns the hard way - and too late - what Dan had earlier tried to impress upon him.

An uninvolved man happens to be in the company of two brothers who hold up a diner and kill its owner. Fearing the police and terrified of the vengeance he may expect from the criminals, he flees. As Dan searches for him, one man winds up dead, two critically wounded, and the man who a few short hours ago was an average law-abiding citizen is harried to the point where he is willing to shoot it cut with the police - until Dan manages to show the error of his ways.

Dan Mathews and his officers assist a county sheriff in closing down a club that offers illicit gambling.

A series of fraudulent insurance claims is discovered after Dan Mathews and his officers learn that the "accidental" death of a migrant worker was actually a homicide.

Dan Mathews is determined to find out why the residents of a small town are behaving suspiciously and anxious to see him leave.

Dan Mathews and his officers race against time to find a stolen oil indicator device that contains potentially lethal radioactive pellets.

Dan Mathews has reason to suspect the worst when a courier with a criminal record disappears with $31,000 after an automobile accident.

A young man is put in the uncomfortable position of trying to cover up his father's theft of automobile accessories.

Dan Mathews personally takes on the task of protecting a former crime boss who is scheduled to testify before a grand jury.

A "transportation maintenance service" provided to trucking companies by an apparently legitimate businessman proves to be little more than a protection racket.

Dan Mathews escorts a crusading senator to the scene of his hearings after he receives information that a prominent racketeer plans to murder him.

A recovering addict gives Dan Mathews and a state narcotics agent information that helps them identify an exclusive resort as a front for the distribution of heroin.

A scheming woman takes advantage of her husband, her paramour, and a complete stranger in an attempt to flee the U. S. with $53,000 in stolen funds.

An injured felon discovered in a mountain cabin leads the Highway Patrol helicopter on a difficult chase in treacherous terrain.

Dan Mathews utilizes polygraph testing to identify the individuals who are responsible for the violent robbery of an elderly motel owner.

A highly regarded Highway Patrol officer tenders his resignation after he finds himself unable to subdue and arrest his brother (an escaped prisoner).

Three men rob a series of banks in coastal towns, then pose as fishermen in order to escape in a boat piloted by their leader.

Dan Mathews must cope with a family's effort to protect an emotionally fragile young woman who fled after striking a pedestrian with her car.

Car thieves purchase wrecked vehicles and transfer the VIN plates to stolen ones in order to escape detection.

A distraught engineer sets out on a suicide mission to destroy the chemical plant at which he was formerly employed.

When a ranger checks the woods where a plane disappeared, it results in his murder and in the discovery of a kidnapped woman.

The Highway Patrol helicopter pursues a smooth-talking but ruthless murder suspect who is trying to escape with a hostage over little-used desert roads.

Three thieves use a counterfeit armored car and stolen uniforms to steal $29,000 from a supermarket. The leader of the group becomes increasingly unpredictable and prone to violence as Dan Mathews and his men close in.

A patient parolee decides the time is finally right to attempt the recovery of $250,000 stolen in an armored car robbery.

A café owner's grudge against motorcyclists leads to the accidental death of a Highway Patrol officer.

An escapee from a mental hospital is the primary suspect in the violent death of a farmer.

An alert boy is able to give Dan Mathews information that provides a critical break in the pursuit of a recidivist thief.

A man who picks up a hitchhiker is accused of complicity in an armed robbery when coincidence and circumstantial evidence point strongly toward his guilt.

A gunman and his female hostage unwittingly wander into a designated blasting area.

Dan Mathews and his officers attempt to ensure the delivery of life-saving gas gangrene serum to a 10-year-old victim.

A Highway Patrol officer is murdered while pursuing a car stolen from a lonely bookstore owner.

Two thieves attempt to steal valuable paintings and demand ransom of $500,000. but they are forced to commit murder when the plan goes awry.

Fearing an operation, a resourceful boy with damaged eyesight manages to stay just a step ahead of the Highway Patrol's efforts to return him safely to his parents.

A botched gas station robbery results in the murder of a Highway Patrol officer and the abduction of a farmer and his wife.

A woman's ill-advised attempt to save her former fiancé from a murder conviction results in the realization that the actual killer may still be at large.

A poor prospector arouses suspicion when he suddenly begins paying off long-standing debts from a large roll of new $100 bills.

Dan Mathews and Sergeant Corey spend Christmas Eve searching for a lost six-year-old girl.