An old friend who used to work for the Ponderosa drops by and he has Ben Cartwright read a letter to him as Will Wright's eyes are not what they once were. It's from some sleepy Mexican town and it informs Wright that his son has passed on, no details. So Adam Cartwright volunteers to go to Mexico and seek answers.
It turns out that the deceased James Best was no model citizen and there's a great relief that he's gone. Still the local law Frank Silvera won't talk about it, the widow Ziva Rodann is unfriendly and Pernell Roberts gets beaten up by two locals.
Not one of the better Bonanza episodes, but anything with the presence of the brassy Veda Ann Borg is always worth a look. Veda owns the saloon and she's the only other Yanqui in the village. It's a typical and perfect role for her, her scenes with Pernell Roberts have the typical Borg bite to them.
I'd watch it for her alone.