Riders of the Rio Grande (1943)

Ladrones de ganado muy organizados trabajan con mataderos portátiles y furgones refrigerados. El gobernador pide a los Tres Mesquiteros que investiguen.

Los Tres Mesquiteros capturan a un ladrón de caballos, que es puesto en libertad por un juez corrupto. Reúnen firmas para obligar al gobernador a investigar, pero uno de los portadores resulta muerto y Stoney es acusado del crimen.

El gobierno del estado planea construir una presa que acabará con las propiedades de granjeros y rancheros. Su intención es compensar con equidad a los propietarios pero un taimado promotor de bienes raíces complicará las cosas. Los rancheros se unirán para combatir tanto a la ley como a los malhechores.

La bonita propietaria de un circo posee un rancho, pero nunca ha ido a verlo, aunque tampoco se lo quiere vender a Mike Abbott. Sus socios, conchabados en secreto con Abbott, sabotean el espectáculo para obligarla a vender, pero en cambio ella se instala a vivir en el rancho.

Con él mismo y su padre sin trabajo por culpa de Balsinger, quien controla los empleos, Will Parker roba ganado para mantener a su familia. Los Tres Mezquiteros intentan ayudarle, pero es apresado y encarcelado...

The three Mesquiteers try to recover the gold stolen by a gang in its effort to ruin the banker/mayor who ordered them to leave town.

Stony, Tucson y Lullaby, "Los Tres Mosqueteros", deciden dejar sus negocios de la ganadería e invertir en el negocio de las aerolíneas. Compran un avión para enviar oro, pero el dueño de la aerolínea contrata a unos delincuentes para secuestrar el avión y quedarse con toda la riqueza. Los tres amigos tendrán que buscar el avión para recuperar todo su oro.

When a group of World War 1 buddies head west to farmstead, they run into trouble.

It is 1853 and settlers are pouring into California which means trouble for the old Spanish landowners. The El Dorado Mine Co. wants the land of Don Ortega for the minerals and is using the settlers and his friend Don Carlos to take the land over. But Tucson is on the side of Roberto and see's that something is not right with all the trouble they have been having. But the situation turns ugly for Don Ortega when Roberto is set up for a murder he did not commit.

The Three Mesquiteers, as army scouts, soothe hostilities between the Army and Indians after both have been riled by someone with a hidden agenda - a renegade chief, who is found to be masquerading as an Army interpreter.

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

Talbot uses a phony land grant to rule thirteen million acres, taxing everyone heavily and evicting those who won't pay. The Three Mesquiteers becomes mysterious "night riders" to fight this evil.

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.

The first of eight "Three Mesquiteers" Westerns to star John Wayne.

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

The Mesquiteers try to help their friend build a telegraph system, despite a local newspaper editor's attempts to sabotage the lines.

Daggett is out to stop the completion of an oil well. He cheats Foster at poker and then forces him to delay the drilling. But the Mesquiteers are on the job with Lulaby posing as a cleaning lady to get evidence.

In 1937 the life in out West has not changed much. The boys are working at the Wyoming ranch of Captain Marvin herding horses which he sells to Kurt Redman. Marvin will not sell any horses to any army, but the boys find out that Redman is a German agent shipping the horses directly to the Third Reich. When Marvin tries to stop Redman, his son Tad, who is studying medicine in Germany, is arrested and held hostage. Marvin must fire the boys as the sneaky German agents take over the ranch, but the boys will not give up their attempt to stop them.

Stony's brother George has been accused of murder and the Mesquiteers have returned to prove his innocence. But they find that Harvey rules the town along with his stooge Sheriff Gray and that George won't get a fair trial.

Harris and Rigby own a circus. Rigby is a counterfeiter and frames his partner. The Mesquiteers learn Rigby is the culprit and get a confession from one of his men only to lose the case when the man is murdered in jail. The Mesquiteers try again and send Lullaby to try and win some of the fake bills in a card game.