In one of his rare movie starring assignments, William Talman (Hamilton Burger on TV's Perry Mason) plays a dual role in The Persuader. Talman is seen as gunslinger Matt Bonham and his twin brother, preacher Mark Bonham. When Mark is killed by outlaw leader Bick Justin, Matt takes his brother's place in the pulpit, ramming the Fear of God down the throats of the wanton townspeople. Impressed by Bonham's courage, the townsfolk begin to follow the straight and narrow path.

William Shatner plays two roles: cowboy Johnny Moon and his ruthless Indian twin brother, Notah. Notah likes peyote and gets the crazy idea that he's the Comanche messiah sent to lead the Comanche nation against the white man but more specifically the dusty desert town of Rio Hondo. Moon, estranged from his brother, decides to stop Notah either by words or by bullets.

When Jim Allen is lynched, his identical twin brother Bob, a Texas Ranger, takes his place in an attempt to flush out the man responsible.

Tom Cameron learns that his twin brother is with a group of German spies. They intend to thwart the government's efforts to round up horses for military service.

A notorious outlaw is recruited by a cattle buyer, secret boss of a gang of cattle rustlers, to impersonate the town sheriff, who is the outlaw's twin brother; and complications ensue, as the sheriff, now a hostage, is on the eve of his marriage while the outlaw's cantina-dancer girlfriend has followed him to town and is at risk of exposing him.

A young man searches for his brother's killer with the help of a gunfighter, a native woman and a traveling medicine man.

In this western, a paroled desperado and his twin, a preacher, wander about the Old West to bring "salvation." The parson begins trying to help a gang leader's niece whose uncle has been forcing parolees to join him or return to prison. Naturally he tries to rope the paroled twin into his gang.

After the death of his mother, evil mutant wizard Blackwolf discovers long-lost military technologies. Full of ego and ambition, Blackwolf claims his mother's throne, assembles an army, and sets out to brainwash and conquer Earth. Meanwhile, Blackwolf's gentle twin brother, the bearded sage Avatar, calls upon his own magical abilities to foil Blackwolf's plans for world domination — even if it means eliminating his own flesh and blood.

Financially hard-pressed, a good-hearted coffee-shop owner asks his twin brother and famous actor for a loan; but, when he faints and collapses on stage, it's up to him to save the day, and his sibling's reputation. Is he up for the task?

Elliot, a successful gynecologist, works at the same practice as his identical twin, Beverly. Elliot is attracted to many of his patients and has affairs with them. When he inevitably loses interest, he will give the woman over to Beverly, the meeker of the two, without the woman knowing the difference. Beverly falls hard for one of the patients, Claire, but when she inadvertently deceives him, he slips into a state of madness.

Viola Hastings is in a real jam. Complications threaten her scheme to pose as her twin brother, Sebastian, and take his place at a new boarding school. She falls in love with her handsome roommate, Duke, who loves beautiful Olivia, who has fallen for Sebastian! As if that were not enough, Viola's twin returns from London ahead of schedule but has no idea that his sister has already replaced him on campus.

Unassuming catering salesmen Jim Ferguson falls through a time hole to 1917 where he saves the life of dashing Royal Flying Corps pilot James "Biggles" Bigglesworth after his photo recon mission is shot down. Before he can work out what has happened, Jim is zapped back to the 1980s......