A government agent in a supertruck named "Stealth" that is loaded with ultra-high-tech weapons and a helicopter travels the highways, fighting evil.
Highway investigates the murder of his fellow Marshall, Stephen North (Kent McCord) and finds that there is more to the story. Androids.
Highwayman transports an alien life form that infects himself and others exposed to it.
Highway breaks an ex partner out of jail to help clear his name in a bank robbery, on the lamb he finds out differently.
Winthrop goes into a government facility and doesn't come out. Highway and Jetto follow her and find themselves in World War 2.
Highwayman and Jetto befriend a subhuman clone called Mac, only to discover he's been programmed to assassinate the mayor of a major city.
A doctor provides a black market organ donor service to the rich and powerful. Highwayman assists a police officer determined to save her sister from being the next 'donor'.
A mobster who is looking for the man who will testify against him abducts anyone who might know where he is. Eventually he grabs Winthrop and Highway and Jetto try to find her.
Jetto suffers a head injury causing flashbacks to his time in the service and a previous head injury that caused him to forget the cause of it.
Highway and Jetto investigate a murder connected to a mine on native American land. The murder is said to be by native American spirits upset by the mine.