In the 10th film of the 66 Hopalong Cassidy movies, Russell Hayden makes his first (of 27 consecutive) appearances as Cassidy's sidekick/protégé "Lucky" Jenkins. The character's actual name in the many Clarence E. Mulford books that featured him was "Mesquite" Jenkins, and Hayden's role was billed in this film as Mesquite "Lucky" Jenkins, and this film was the first and last mention of Mesquite Jenkins. This initial pairing of the trio of William Boyd, Russell Hayden and George Hayes (who only became known as "Gabby" when he wasn't allowed by Paramount to carry his "Windy" moniker to Republic when he departed the Cassidy series, which makes any pre-1939 cast listing showing a credit listing for a George "Gabby" Hayes a misnomer and in error for those who don't care for revisionist film history) is the one that many western-film and/or Cassidy devotees consider the best of all the trio pairings in the series.