Nothing against the regulars or the guest stars who did the best they could with this story. But the writers must have been on hallucinogens to have dreamed up the characters and the plot.
It seems as though way back, the Ponderosa foreman went to Russia and became an adviser to the Romanov court on breeding and maintaining cattle. He in turn got himself a title and begat himself a brother and sister count and countess in Warren Stevens and Claire Griswold.
Now they're grownup and visiting the Ponderosa with cavalry and secret service protection and she's got jewelry said to be worth a quarter of a million dollars. That kind of swag you leave in a vault in St.Petersburg but no Griswold takes it with her to show it off to those plebeian Americans.
Who should show up at the same time but Lloyd Bochner, a Russian prince who was a rogue back in St.Petersburg and hasn't changed his ways. He's got it in mind to steal those jewels. It's a nice reunion but everyone including the Cartwrights is wary.
I won't say any more, but this is as preposterous a plot premise as I ever saw on Bonanza. The idea for this episode came from an actual tour that a Romanov crown prince made of the American west during the Grant administration with Buffalo Bill Cody serving as guide.
Better they had worked that into the story than what we got here.