Lesley Selander Director William Boyd Hopalong Cassidy Actor George "Gabby" Hayes Windy Halliday Actor Russell Hayden Lucky Jenkins Actor Paul Sutton Mine Foreman Slade Actor Gwen Gaze Ann Dennis Actor Pat J. O'Brien Frazier Actor Joseph De Stefani Assayer Perkins Actor William Dunkin Buck Peters Actor Walter Long Duke Pierce Actor H. Bruce Mitchell Ross Actor John Beach Denny Dennis Actor Arnold Belgard Screenwriter Harry Sherman Producer Russell Harlan Cinematographer Robert Warwick Film Editing Lewis J. Rachmil Art Director