The Mysterious Avenger

Cowboy infiltrates an outlaw gang to expose their rackets, but after he's ordered to kidnap a young girl, the gang finds out who he really is.

Reb Russell (Reb Russell), undercover agent for the Cattleman's Protective Association, goes into the stronghold hideout of rustler chief Bull Thompson (Fred Kohler) posing as an outlaw. He falls in love with Marion, Bull's step-daughter. Juan (Dick Botiller), a gang member once jailed by Reb, reveals Reb's true identity, but he will be given his and Marion's freedom to leavy the valley if he can beat Thompson in a fight. He does, but Butch Greer (Jack Rockwell), a gang member trying to take over from Thompson leads the gang after the pair, after first revealing to Thompson that Reb is Thompson's own son, whom he last saw as a baby when Thompson, then known as Big Bill Russell,was forced to flee the law. Thompson and loyal gang member Blackie (Edmund Cobb), who was once helped by Reb, go after the gang in an effort to help Reb and Marion escape.

Russell Hayden, taking a break from playing Hopalong Cassidy pictures, stars as Renn Frayne, a college-educated youth heading westward who finds more than he bargained for. Following a terrifying run-in with an outlaw gang, Frayne aligns himself with the heroine Holly Ripple (Jean Parker), whose father's cattle ranch is in danger of falling into the hands of the villains. Victor Jory as Malcolm Lascallie, the wily gambler,

A renowned former army scout is hired by ranchers to hunt down rustlers but finds himself on trial for the murder of a boy when he carries out his job too well. Tom Horn finds that the simple skills he knows are of no help in dealing with the ambitions of ranchers and corrupt officials as progress marches over him and the old west.

Winters is after the Brand ranch, and his man Brett who is foreman there is rustling the Brand stock. But Tom is on to their game and breaks up their attempt to buy the ranch. When they plan to rustle their horses, Tom must not only rescue Danny Brand, who is their prisoner, but stop the rustlers.

A saddle-weary Steve Larkin, also the Duranko Kid, rides into Red Mound, a town filled with cattle rustlers. Cafe owner Smiley, befriends Steve and fills him in on the activities. Steve angers the rustler's leader, Flip Dugan when he purchases the old Atkins ranch which is supposedly haunted. Flip and his henchmen try to prevent the recording of the deed, but the Durango Kid and Deputy Marshal Tug Carter win the gun battle.

Outlaws of the Pandhandle was the last of Charles Starrett's "formula" westerns for Columbia: hereafter, Starrett would be seen only in the guise of frontier medico Steven Monroe or masked do-gooder The Durango Kid. For the moment, however, the star is cast as Jim Endicott, bound and determined to put an end to the underhanded activities of gin-mill operator Faro Jack Vaughn (Norman Willis). The villain's strategy is to get the local cowpunchers tanked up on rotgut that they'll prove to be easy pickings for a gang of rustlers-and will be unable to complete work on a railroad spur which will bypass the outlaws' hideaway.

US marshal Len Merrick saves Tim Keith from lynching at the hands of the Roden clan, and hopes to get him to Santa Loma for trial. Vindictive Ned Roden, whose son Ed was killed, still wants personal revenge, and Tim would like to escape before Ned catches up with him again. Can the marshal make it across the desert with Tim and his daughter? Even if he makes it, will justice be served?

Dare Rudd takes a shine to his cattleman cousin Tom's girlfriend who asks Tom to hire Dare to head the big cattle drive. Dare loses the money for the drive to cardsharps, but Tom wins it back, but Dare must save Tom's life.

Rancher Clay Hardin arrives in San Antonio to search for and capture Roy Stuart, notorious leader of a gang of cattle rustlers. The vicious outlaw is indeed in the Texan town, intent on winning the affections of a beautiful chanteuse named Jeanne Starr. When the lovely lady meets and falls in love with the charismatic Hardin, the stakes for both men become higher.

A sheriff tracking a gang of rustlers discovers that one of them is the brother of his fiance.

Burly Johnny Mack Brown once again plays undercover U.S. Marshal Nevada McKenzie in this overly complicated series oater from low-budget Monogram. This time, McKenzie, who goes under the alias of Roy Ferris, is waylaid by would-be stage robber Cy Manning (John Merton) en route to the Bar X Ranch.

When a woman turns outlaw, she is suspected of murder.

Originally written as a stage vehicle for corpulent character actor Macklyn Arbuckle, Ernest Day's The Roundup was first filmed in 1920 with Fatty Arbuckle (no relation) in the lead. By the time the film was remade in 1941, Arbuckle's character, a roly-poly frontier sheriff named Slim (!), was refashioned as a supporting role, with Jack Benny's radio announcer Don Wilson essaying the part. The plot, however, remained fairly intact: Upon hearing that her fiance Greg (Preston Foster) has been killed, Janet (Patricia Morison) agrees to marry rancher Steve (Richard Dix) on the rebound. On the day of the wedding, who should show up but Greg, determined to raise as much Hell as humanly possible

A caravan of settlers is arriving and the ranchers intend to keep them out. It looks like a range war but Sheriff Jim gets the ranchers to accept the settlers. Kohler re-ignites the feud by making settler Winters appear to be a rustler and then by killing Winter's son. Once more the two sides appear headed for a war and Jim is caught in the middle.

The Kid and his pals are horse thieves wanted by the law. As he takes a horse from Jan Walton she makes him promise to bring it back.

Steve Beaumont, an operative for the Cattleman's Protective Association, is assigned the difficult task of breaking up a murderous gang of rustlers led by Ed Brock and Strang. He takes Sheriff Webb, Judge Baxter, and rancher Ann Houston into his confidence, and works his way into the rustler stronghold and confidence by "turning rustler" himself.

Arriving at Medicine Bow, eastern schoolteacher Molly Woods meets two cowboys, irresponsible Steve and the "Virginian," who gets off on the wrong foot with her. To add to his troubles, the Virginian finds that his old pal Steve is mixed up with black-hatted Trampas and his rustlers...then finds himself at the head of a posse after said rustlers; and Molly hates the violent side of frontier life.

Billy Carson is accused of the crimes committed by his dead-ringer, outlaw cousin Jim Slade, and barely escapes a lynching. With the aid of his pal Fuzzy Jones, Billy catches up with his cousin and clears his own name.

For revenge the outlaw Morgan steals the Carruthers young son. Seventeen years later Carruthers arrives in the valley where Morgan, his gang, and the now grown Bob hide. After Morgan shoots Tracy, he tells Bob that Carruthers did it and sends Bob out after him. But unknown to Bob, Morgan has put blanks in his gun.