A young stable hand becomes upset when the town people won’t give him the reward money he deserves for killing a notorious outlaw - because he was shot in the back.
"The Man From Salinas"
A young man comes to town to collect the body of his dead brother, but Lucas suspects the main isn’t who he says he is.
From "The Rifleman Episode Guide List"
Many of these posts about individual episodes of 'The Rifleman' are proving to be theories of relateeveety, and this is a tele-quickie along the same lines:
Hoby Gilman was a Texas Ranger (and a member of the TV Crossover Hall Of Fame) seen in the TV series 'Trackdown'.
Colly Vane ("The Hero") and Dave Foley ("The Man From Salinas") were probably his younger cousins, identical cousins. But I don't know if you'd find that they laugh alike or walk alike, or even if they talk alike......