Bronco investigates a planned train wreck that killed one of his best friends.

Bronco is hired to guide a writer to a ghost town, but repeated attempts on both their lives reveals her true purpose: to find a man buried in a nearby glacier.

Bronco leads a wagon train through the wilderness but the danger comes from within as an old war buddy provokes a local cattle baron when he brings along the man's runaway daughter.

Major Damayer hires Bronco to guide him into Indian territory to make a request of Sitting Bull.

Bronco is saved from a hired gun by the quick draw of the Reverend Dave Clayton, arousing suspicions that the preacher is really a gunman.

Sheriff McKeever is killed when his scheme to restore his gunslinging youth fails, leaving deputy Bronco to discover who was behind the backfire.

Bronco is hired to teach at a military academy but ends up searching for a would-be killer after a cadet's realization that he's half-Sioux prompts an attempt on his life.

Bronco tries to solve the murder of the town's most popular man, found dead with Bronco's gun in his hand shortly after a bank robbery.

Bronco agrees to deliver a riverboat for his friend Martha Chandler despite a ruthless businessman intent on stopping the cargo from reaching its destination and a blonde passenger with a mysterious agenda.

Bronco relives a wartime experience while testifying in the trial of his would-be killer.

Bronco is hired as a bodyguard, but when he fails to keep the man alive, he's faced with a host of people confessing to the killing.

Bronco goes in search of the only man who can clear him of a murder charge, but must disguise himself when his quarry goes to ground in a lawless town known as a haven for criminals.

Bushwhacked by an escaped convict, Bronco is saved by a local rancher and becomes involved in his feud with a neighboring family.

Bronco finally talks an Army officer into sending the Osage to a fertile Wyoming territory, but a cholera epidemic and a hostile new commander threatens to destroy the plan.

Bronco helps a young Teddy Roosevelt fight a rancher trying to drive the Indians off their land.