It begins when Dodge is getting ready for a hanging of prisoner Dobie Price. The Marshal is trying to find a person that will serve as hangman and runs across a volunteer named Elihu Gorman (Chill Wills). This Elihu Gorman is a former outlaw that is also Dobie Price's cousin. Gorman wants to see cousin Price hang for some past transgression made against him.
But before any of that can happen, Dobie's gang breaks him out of jail. With Festus injured, Gorman tells Matt he knows where Dobie is going and will lead him. For some unknown reason, Matt gives him a deputy badge.
They set off on an adventure to find Dobie. Along the way they get into a few problems all related to Gorman. Till at last Gorman finds the hideout where Dobie is located.
This is not one of the strongest episodes. Could not really get into the character of Gorman since Matt already knew he was an outlaw and could change his colors at any moment. It's a plot played out many times in the series. The only thing that has changed is instead of taking Festus -the Marshal picks a known outlaw--- he has just met, that is the cousin of the person wanted. That is hard to comprehend