Bret and his buddy Waco Williams (Wayde Preston) ride straight into trouble in Bent City, where they are suspected of being cattle rustlers.
Young Billy flees Dodge in fear after being suspected of shooting dead an older saloon girl whose sexual advances he had been resisting.
Estevan still hopes to marry the wealthy Margarita but he knows that Zorro will continue to oppose him. Don Alejandro suggests that if Estevan were to settle down and begin farming, Zorro would realize that his intentions are honorable. He gives the visitor a small plot of land and wishes him well in his endeavor.
McCain befriends Donnel O'Mahoney, a tough kid from Brooklyn, and arranges with two men for the young man to continue his travels on their wagon, but then one of them is murdered and the other accuses the boy of having done it.
A female photojournalist on assignment in France takes an apartment and begins to work with a somewhat mysterious male model. Thngs come to a head when she has a brush with the supernatural that could well mean her death.
Cuban Bandleader Ricky Ricardo would be happy if his wife Lucy would just be a housewife. Instead she tries constantly to perform at the Tropicana where he works, and make life comically frantic in the apartment building they share with landlords Fred and Ethel Mertz, who also happen to be their best friends.
It's murder most foul when a man decides to drown the longtime girlfriend who's been supporting him, but his crime doesn't go unnoticed for very long.
After losing his money in a bank robbery, Bart invests in a get-rich-quick deal with a beautiful — but not-so-dumb — blonde.
An old friend of the family comes to Dodge looking for Kitty, but when he finds out she's a saloon owner, he's dismayed. Intent on defending her honor wherever she is insulted, he nearly gets himself killed. Kitty finally tells him that she has no honor, and he keeps making a fool out of himself thinking otherwise. It sends him away and saves his life at the same time.
Still hoping to strike it rich during his visit to Los Angeles, Estevan shows a great deal of interest in a young woman when he learns she comes from a wealthy family. Don Alejandro accuses Estevan of only being attracted to Margarita because of her money, but the suitor denies the charges, forcing Diego to dress as Zorro in an attempt to frighten Estevan away.
Aaron Pelser's wagon train came across a pair of young boys on a buck board heading west and invited them to join the train. When he found out that one of the boys was actually a girl and the two claimed to be headed to Yuma to get married, Pelser and his crowd force them to be married in North Fork. The wagon train folks want to throw a shivaree, which may have been innocent enough except for two reasons. The first reason being that the couple does not count it as their wedding because they want to be wed by the groom's father in Yuma. The second reason is that Chet Packard keeps pushing things too far, beyond the spirit of a friendly shivaree.
A desperate department store owner foolishly agrees to a scheme to have her store burned down so she can collect the insurance, but the fiery transaction doesn't go down as planned.
Bret Maverick finds himself caught in a deadly love triangle with a lovely woman (Abby Dalton) and a young gunman (Clint Eastwood).
Trail boss Dolph Quince sends for his friend Matt to help escort his cattle herd into Dodge because he is having trouble with Jayhawkers (Kansas renegades), and he hopes to ease the animosity his men have towards all Kansans.
Estevan again becomes a problem for Diego when he decides to earn some easy money. Los Angeles is preparing for its annual horse race and Estevan would like to win the prize money, but his horse seems unlikely to win. His luck changes when he comes across Zorro's horse, Tornado, grazing in a hidden field, and he captures the animal.
A young Englishwoman is suddenly wracked by dreams of drowning in the ocean. She is stunned when her fiancée tells her that he has prepared a surprise honeymoon trip for them--they're sailing to New York on the passenger liner Titanic.
Abel Goss, the photographer who took Lucas' wedding photograph, is in North Fork doing a portrait of Mark standing in the street. When Goss sees Col. Whiteside and his sidekick Jamison, he recognizes them as the butchers who tortured him and others while he was captive in their prisoners of war camp. When Lucas stops him from killing them, Goss swears to kill those men. Whiteside planned to call Goss out, but he had Jamison shooting from the upstairs hotel window, as his insurance. When the shots are fired, Whiteside is dead, shot in the back, and his gun hadn't been fired. Goss is arrested and at the trial Lucas and Mark have different testimonies. Mark reenacts the scene in the street, and Lucas backs Mark's theory , using the photographic negative Goss had shot of Mark.
Despite his warnings, the media event occurs, and the power cables that string into the craft fully activate it for the first time. Glowing and humming like a living thing, it starts drawing upon this energy source and awakening the ancient racial programming. Those people of London in whom the alien admixture remains strong fall under the ship's influence; they merge into a group mind and begin a telekinetic mass murder of those without the alien genes, an 'ethnic cleansing' of those that the alien race mind considers impure and weak.