Season 1, episode 18.
Original air date: 19 November 1950.
Cast:Gene Autry (Gene Autry), Champion (Champ- Gene`s horse), Pat Buttram (Pat Buttram), Gail Davis (Ann Lawton), George J. Lewis (Jeff Forbes), Chuck Roberson (Tucson, Henchman in Vest), Kenneth MascDonald (Tom Lawton), Lee Phelps (The Marshal), Dick Alevander (Tex, Beefy Camp Henchman)), Wes Hudman (Pete, Lanky Henchman), Frankie Marvin (Mack Forbes: uncredited) and Frank Matts (Ranch Hand barker: uncredited.
From IMDB.

Ummm.....actually Johnny Marks wrote the song. Autry recorded it in the late 1940's. But back Gene's show, a fun, rollicking episode. Kids in the 1950's would wear their Autry six-shooters and 'shoot' at the tube while watching.

Uh, just so you kids know, Gene Autry wrote Rudolph the Red Nosed Reindeer. And 1 or 2 others as well.