Seriously injured Matt faces a moral dilemma when Blue Horse saves his life and prevents the escape of a prisoner. The Marshal knows that Blue Horse is being sought by the Cavalry as a fugitive from a reservation, and he is well aware that he is duty-bound to assist their search in any way possible.
Capitan Arrellanos continues his attempts to rule California by hiring Carmelo, a recent arrival to the pueblo, to kill the governor. Diego and Bernardo overhear the plan but don't act at once, hoping instead to learn who the other conspirators are. The governor has begun to recover and spends his time sitting outside on the patio, which prompts Don Alejandro to give a party to celebrate his better health.
A man is found innocent of his wife's murder. Her brother arrives from New Zealand and precipitates the real culprit's capture.
When a local bank clerk cheats him out of $200, a man takes extreme measures to get back his money.
Dodge City's businessmen learn a hard lesson when they reject Matt's advice and hire a meek constable to handle a gang of rowdy but free-spending trail cowboys.
Young Jimmy Morrow can't seem to catch a break. Already on probation for car theft he's charged with stealing a valuable Spanish cross and killing its owner. Perry feels sorry for the kid and decides to take the case.
Capitan Arrellanos refuses to help the Rebatos any longer in their attempts to kill the governor. Instead, he chooses another plan designed to make him the head of the government. He asks the governor's daughter to declare her father too ill to continue in office. Furious at this request, Leonar refuses to cooperate. She then tells her father of the aide's plot.
Lucas McCain gives blood to save a dying man and is surprised by Marshal Torrance's odd behavior toward the man. Then three men arrive from a nearby town and demand custody of the stranger.
A newspaper reporter gets a tip about an out of this world story: a man who claims to be a Martian.
Print Asper is suspected of attempted murder when he forces a crooked lawyer, at gunpoint, to return the ranch he stole from him, and the lawyer still ends up getting shot later by someone.
The governor of California is attacked during a visit to Los Angeles with his daughter and aide, and barely escapes with his life. Taken to the de la Vega house to recover, he is much too weak to travel for several days. The aide, Capitan Arrellanos, tells Diego he suspects the attack to be the work of the Rebatos, a group that wants to sever ties with the government in Spain.
Although a drought has forced local cowhands to seek work on a railroad construction project, railraod executives are afraid that their workers will desert them if they believe an old man's claim to have found a way to make rain.
A prominent lawyer appears able to manipulate any situation successfully - except, perhaps, for his marriage.
Gunman Kin Creed arrives in Dodge determined to enhance his reputation by outdrawing Matt in a gunfight. He goes to great lengths to force Matt into a confrontation and is able to wound him, but it proves to be a pyrrhic victory.
Martin Selkirk is a major league rotter who wants Claire Allison in the worst way even though she's dating Dirk Benedict. Selkirk has Dirk's jaw broken and begins sending Claire threatening mail. Then Selkirk is murdered in his beach house and Claire is arrested for the crime. Perry takes the case and finds that the evidence points in the direction of Selkirk's five year old son. Or does it?
Sergeant Garcia returns from escorting Padre Simeon on a trip from San Diego and is surprised to find that almost everyone in Los Angeles has contracted the measles. The doctor has placed the entire pueblo under quarantine and restricted residents to their homes. Even the soldiers cannot leave the cuartel.
While on patrol during WWII, a German U-boat attempts to evade detection from the sonar of the American and British ships. But their location is repeatedly betrayed by the noise of a rhythmic banging sound caused by someone . . . or something . . . on board the submarine.