In order to find an outlaw gang, Steve and Rusty follow one of their members who has recently been released from prison. But before he can lead them to the gang's hideout, he is killed.

Steve and Rusty come across a dying boy who tells them that he has been framed for murder and then poisoned.

Steve and Rusty come across a young man who incurred brain damage when he tried to save some children from a runaway horse. He needs an immediate brain operation, but has no money.

Donovan seeks the aid of reluctant cattlemen in pursuing thieves across the border. 

Donovan's search for the murderer of a marshal leads to a woman who has terrorized an entire town.

A vicious land exploiter plots the murder of Indian Affairs general to thwart peace negotiations with the Apaches. 

Donovan tries to get a wary banker to grant a loan to Indians. 

A young marshal tries to live down his gangster father's reputation by rounding up a gang of crooks alone.

A greedy foreman plots to have his widowed employer evicted from her land.

Steve has to prove that the strength of the law he represents is greater than that of professional gunmen and is almost knifed.

A convicted murderer breaks out of prison intent on killing the men responsible for his incarceration – Steve Donovan and Lou Park.

A young boy who has recently lost his father is going through his dad's possessions when he finds a mail sack full of money.

Steve and Rusty break up the infamous Yarbo gang. However, in doing so they find themselves responsible for the care of a 16-year-old boy.

An Indian raid on an army wagon inflames tensions that may erupt into an Indian war. Steve and Rusty investigate and discover that it was actually white men disguised as Indians who committed the raid. They set out to find out who was behind it.

Rusty has been studying how to be a ventriloquist, a talent that may come in handy when they investigate a man who may be a murderer.

Donovan tries to shield two outlaws from a lynch mob.

Steve and Rusty go after counterfeiters who are operating near a border town.

Deputy Marshal Rusty Lee poses as a cattle buyer carrying a large sum of money to lure the Cantrell gang into a trap.

Steve has to protect sullen young thief from his cohorts, his family and an avenging Indian tribe.

Donovan meets with fierce opposition when he tries to set up a marshal's office in a lawless town.

Steve and Rusty come up against a bitter old doctor still angry about how he had been unjustly treated in the past.

A desperado handcuffs Donovan.

Donovan and Rusty lay out a trap for the elusive Comanche Kid.

A colleague prevents Donovan from arresting a criminal.

Donovan and Rusty arrive to a mysterious canyon searching for elusive outlaws.

Donovan and a woman fall prey to a sinister gang.

Donovan and Rusty try to expose a plot to overthrow the Government.

A crooked actor uses disguises to rob a payroll delivery.

A corrupt politician abducts his oppnent's daughter to secure his path to the mayor's office.

The stage coach is held up and the driver is killed by "the most desperate outlaws the world has ever known. The female owner of the stage line is in cahoots with the head outlaw. Our hero, Steve Donovan, is doubtful at first but he catches on fast.

A murderer has sought refuge in a ghost town.

An artist helps Donovan identify an eldelrly woman outlaw.

A school teacher is embroled in a streak of robberies.

A meek newspaper editor is witness to a crime.

Donovan is assigned to escort a prisoner through an outlaw-ridden trail.

An outlaw is posing as the sheriff of a town.

A sexist sheriff ignores women's rights to vote and rigs the elections. Steve and his deputy must intervene.

An outlaw gang blackmails a quarantined town by stealing a serum.

A deputy lets a crooked gambler escape from prison. The lawman is in debt with the outlaw.