The Rifleman - Season 1 Episode 5
The Brother-in-Law

Marks uncle, Johnny Gibb, a big time rodeo rider, comes to visit. While Mark idolizes his uncle, Lucas discovers that Johnny is on the run from the law for an Express Office Robbery. Stacy has a bronco named Lucifer, that nobodys been able to ride for 15 seconds. Alvah, wanting to humble the almighty Mr. Stacy, asks Johnny if hed ride Lucifer, so that he and the townsfolk could bet that Johnny would ride Lucifer for 30 seconds. Johnny agrees and then makes a deal with Stacy to throw the ride for $500.00. After spending time with Mark, Johnny decides to give the ride his best and then turn himself in to Marshal Torrance.