New Ranger Erik Hunter goes undercover to join the bank robbery gang of Midas Mantee.
Native Americans are on the warpath and they have captured Winchester rifles and a Gatling gun among their weapons.
An ex-convict wants revenge on Captain Parmalee for sending him to prison and gets a crooked doctor to inject Reese with a mind-controlling drug so that the Ranger will do the job for him.
When a pro-Juarez rebel is abducted from protective custody by a gang loyal to the French regime in Mexico, it's the four Rangers to the rescue.
Reese's yearly enlistment in the Rangers is almost up and he uses reward money from the capture of an outlaw to purchase some ranch land. Then he discovers that the duo who sold him the land are con artists and that the land is under alkaline water.
A Chicago gangster named Finnegan decides to begin organizing crime in Texas. He begins by importing name outlaws wanted outside Texas and teaches them his methods in various rackets. The Rangers get on the case when a stagecoach robbery by some of Finnegan's men goes awry.
Erik goes undercover as a magician to get the goods on a group of circus performers who have been perpetrating a series of bank robberies.
The Rangers attempt to get a mining payroll past a gang of hillbilly bank robbers.
Reese changes places with a millionaire after the tycoon is the victim of kidnapping threats.
Flat broke, Rangers Joe, Chad, and Reese accept the offer of $10.00 apiece from a nine year old girl to accompany her to the town of San Remo where she's going to live with her uncle.
The four Rangers must discover who has been raiding settlements and kidnapping skilled workers in them.
Chad switches places with a European prince who's his exact double in order to foil an assassination plot aimed against the prince.
Captain Parmalee and the Rangers must negotiate with a tribe of hostile Native Americans to keep a wagon train from being massacred. Things get complicated when the chief's overweight and homely looking daughter falls for Reese.
Reese enlists the aid of four young boys to capture the Sam Dixie gang.
When outlaw Clay Morgan runs a minister out of the town of Black River, Captain Parmalee sends Erik and Chad back to the town disguised as ministers in order to establish a church and get rid of Morgan.
Reese develops amnesia after being thrown from his horse and believes that he's a wanted outlaw.
Reese assumes temporary custody of a young Native American boy whose traveling party was wiped out by an outlaw gang.
Joe saves the life of a beautiful Chinese girl and must protect her from an opium lord who wants her to be his wife.
The Rangers get involved in a conflict between cattlemen and a group of pacifist sheep raisers.
The Rangers discover that outlaw Bart Cutler is in reality Captain Parmalee's brother, Frank, whom he thought had died in the Civil War.
A nursery rhyme holds the key to the murder of a printer carrying counterfeit money. Unfortunately, Ranger Cotton Buckmeister can't remember how the rhyme goes.
Erik rides into the nearly abandoned town of Small Chance in search of Reese who has disappeared and was last seen there.
Rangers Joe Riley and Cotton Buckmeister are picked to serve on a jury trying a Native American for the murder of a white woman.
Captain Parmalee keeps sending Rangers out to evict a family from their land to make way for a railroad but neither the Rangers nor the family seem to want to leave.
Rangers Chad, Joe, and Cotton Buckmeister are promised a $50 bonus each if they will transport a bottle of nitro and the professor who invented it to an Army fort.
Captain Parmalee and a host of notorious outlaws are named as beneficiaries in the will of recently hanged Jake Ringo.