1938
David Ross organizes the ranchers into a vigilante group to rid the town of outlaws. The plan succeeds but the trouble starts when some of the men form a new vigilante group and posing as the original one plunder for loot.
1937
When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.
1941
It's "The Three Mesquiteers" again. Gaucho escapes from Braden's gang only to be shot by them. The Mesquiteers drive away the outlaws and take his money on to his mother. But Isabella thinks Tucson is her long lost son and they don't have the heart to tell her he is dead.
The Cherokee Strip is off limits to the Rangers, so that is where badman Lemar operates from. When the Rangers capture his brother and the jury sentences him to hang, Lemar starts killing the jurists. Then the scoundrels kidnap the Captain's daughter Doris... Written by Tony Fontana
1940
Stony Brooke, Rusty Joslin and Rico, known as The Three Mesquiteers, return to Oklahoma at the close of the Spanish-American War, and are concerned that some of their wounded buddies have no prospects for a satisfactory future. When the government offers preferred homesteads in the newly-opened Oklahoma territory to war veterans, they send word for their pals to join them there. Once there, the veterans meet a hostile reception as the cattlemen resent the influx of "nesters" and are determined to drive them out. Mace Liscomb and his brother Orv plan not only to drive out the homesteaders, but to also double cross the cattlemen and gain exclusive titles to the range lands for themselves. Stony and his pals eventually show the honest cattlemen that there is room for the settlers and that both are fighting a common enemy. Written by Les Adams
1942
After a payroll robbery the Mesquiteers catch up with the gang. But the members escape, the gang leader is killed, and they end up with only the leaders young son who is quickly sent to a work farm. They adopt the boy hoping to learn where the money is. Just as their kindness is about to pay off a gang member takes the boy away forcing him to retrieve the money. - Written by Maurice VanAuken
Commissioner Tredwell is the law of the land and he gets whatever he wants with the help of hired guns and lackey lawyer Conners. The only one who publicly stands up to Tredwell is Beecham of the Clarion. Beecham has his paper burned to the ground and when he starts a petition to make Wyoming a state, taking the power away from Tredwell, he is killed. But when Kansas Kate comes in to visit her son Conners, she sees what is going on and she takes over the paper and keeps the pressure on Tredwill. With this Conners has mixed emotions, but the boys do everything they can to protect Kate and the paper. Written by Tony Fontana
A crooked real estate manipulator sells worthless land on mortgage to flood refugees, then tries to profit by reselling the land to the state, committing murder in the process, as the Three Mesquiteers work to bring him and his gang to justice.
