Yuma rescues old Sam Amister from thieves and takes him to his hometown where Yuma learns Amister is hated for grave robbery but Yuma expects there is more to his grave digging than just stealing valuables.
A middle aged plumber is suspected of bludgeoning to death the father of his 19-year-old love interest, but the Sheriff can't figure out how the man could have done the crime and been caring for his baby grandson at the same time.
The Cartwrights encounter racial bigotry in Virginia City and end up protecting a Chinese boy from mob violence. Victor Sen Yung, in his largest role to date, speaks normally in the presence of his fellow countrymen, but reverts to broken English when with the Cartwrights.
Matt has reason to believe that the new overweight, gun toting, straight shooting, female owner of the Lady Gay saloon may have killed the previous owner, or did she?
Ward allows Beaver to check out a book on his library card but when Beaver loses the book he becomes convinced that Ward will be put in jail, thanks to Eddie Haskell's wiseguy comments.
Tight fisted Franklin Gibbs is not pleased when his wife wins a trip for two to Las Vegas. But things change when he falls under the spell of a slot machine that calls his name.
Spring 1931. Gangland warfare had broken out again with sudden violence in the streets of St. Louis. Tim Harrington, who was long entrenched as the undisputed boss of the city, was fighting off the challenge to his leadership from Joe Courtney, an upstart hoodlum. The elder Dink Conway calls for a sit-down between the two, at the Jockey Club. Dink points out they are operating the old way: shootouts and dealing in cash. He offers them organization and protection, and says the new way is to use fronts to cover your criminal activities and keep books so the Feds can't get you on income tax evasion (he knows what happened to Al Capone).
Lucas is drawn to a young widow passing through town on her way to claim an inheritance, but others who covet it are trying to kill her.
Some important things get lost in translation when a South American oil explorer agrees to have his loyal native assistant take his murderous wife to a head shrinker for her health.
Glory, a saloon girl, has been banished from town for murder without trial. Yuma offers to help her but while in town he runs afoul of Emma Longdon who has falsely accused Glory to keep her from her brother Don.
A beautiful widow (Julie Adams) asks Bart to protect her from an unknown killer. He accepts — unaware that he is the intended victim.
Ben Sutton is listed as the author of a best-selling book describing his experiences in a Korean POW camp. When the real author is released from an Army hospital, Sutton is slain before he can tell the truth and his widow is arrested for the murder.
In the first all-out comic episode of the series, Hoss and Joe travel to Kiowa Flats, Texas, where they are mistaken for the notorious Slade Brothers, also played by Blocker and Landon.
Matt and his friends try to come to the aid of a has-been actor caught cheating at cards.
An upcoming test in history, Wally's weakest subject, has Wally studying all weekend and has Larry and Eddie coming up with a plan that will give them good grades on the test.