Forgers are passing checks in communities, then vanishing without a trace; Dan works out their pattern, pinpointing their next strike but the crooks escape in traffic.
When a gem collector has a heart attack on the highway, his car is impounded; check reveals that valuable, uncut diamonds are missing, and a highway patrol officer is the only one who had access to the car's trunk.
Two safecrackers hide in a truck to rob a manufacturer's safe overnight. The driver, their cohort, drives them away the next morning.
Posing as a salesman, a man lines up wealthy prospects in motels; then his two female accomplices, posing as hitchhikers, relieve the victims of their money.
In a tungsten mine, counterfeiters hide their plates in nitroglycerin, packed in suitcases when a gun-crazyman grabs the suitcases and flees, unaware of the explosives.
Motorcycle-riding armed robbers elude Highway Patrol roadblocks by loading their bikes into a closed truck driven by their leader.
Because of his wife's fears, Patrolman Ed Wylie resigns from the force after fellow officer Jerry March is killed in the line of duty.
Two brothers hijack a new-car carrier, planning to sell the cars to get cash to purchase a farm; when the driver dies from injuries sustained in the hijacking, they make a panic-stricken attempt to dispose of the evidence.
An escaped convict abducts his estranged wife and forces her to help him elude the Highway Patrol.
An ex-con wants to return money stolen in an armed robbery, but his former partner has other ideas.
Two convicts steal an airplane to escape from prison and are followed by the Highway Patrol helicopter.
A gemologist and his accomplice steal $300,000 in rough-cut gems from a courier, then attempt to smuggle them out of the country in a dog's collar.
Two wanted men abduct a physician and compel him to extricate a bullet in a wooded area.