This series has always been a rather serious western with the overall theme about how a father loves his son. However, in this episode the writers take a more comical approach that just seems out-of-place for a 'Rifleman' episode. This is one of the few episodes that, after watching, it was so foolish that it would have been a better plot for a Saturday Morning cartoon show than for a western.
Two former friends and army buddies of Lucas comes for a visiting. The intentions of them meeting is to kill each other. One of the men rides up like swashbuckling knight that now calls himself Don Chimera del Laredo and the other is an Irish Colonel, Charles Black, in the US army. The two are set to battle till the death but it will be a game that is different than what the viewer will think.
This is not a poor episode but was not up to the high standards we usually see from the series. By the time the show comes to the end I was not really sure if I had seen 'The Rifleman' or 'Gilligan's Island'. And that is not a good review for any show.