A lucky prospector is the suspect for his partners' murders.

A doctor provides his outlaw brother with a phony death certificate.

Train robbers steal a relief shipment for flood victims.

A drunk fuels conflict between two tribes on an Indian reservation.

A young Mexican farmer disappears, suspected of a banker's murder.

Hoppy investigates a counterfeiting operation; Red is shot dead.

A missing man's son speaks of ghosts and strange occurrences.

Hoppy's lawyer nephew represents a bank robber.

Gold thieves frame a young friend of Hoppy's for murder.

Saboteurs try to prevent Arizona's first telegraph line.

A Gypsy seeks to clear his father of charges of robbery.

Hoppy goes to Mexico to investigate mass murders of Chinese workers.

A Southerner buys a wagon in which thieves hid money.

A banker asks Hoppy to trap robbers hijacking gold shipments.

Drought threatens cattlemen and the banker extending their credit.

Hoppy and Red resolve to help local ranchers against an exploiter who wants to take over Stone Valley and sell it to the cavalry.

After someone shoots at Hoppy and Red in a seemingly deserted town, they discover that the town's only resident has been shot and left for dead.

A likable young man idolizes an infamous criminal.

A marshal accuses a brother and sister of passing counterfeit notes.

Cattlemen and sheep herders threaten to start a range war.

Hoppy helps government agents search for a herd of 625 stolen horses intended for the Spanish-American War.