"Disguising himself as a milquetoast Easterner who writes Western novels, Hoppy enrolls in a dude ranch in order to unmask the murderer of the owner's husband."
William Boyd
as Hopalong Cassidy
George 'Gabby' Hayes
as Windy Halliday
Russell Hayden
as Lucky Jenkins
Charlotte Wynters
as Ann Marsh
Jan Clayton
as Dorrie Marsh
Robert Fiske
as Monte Keller
Kenneth Harlan
as John Marsh
Anthony Nace
as Steve Dorman
Kathryn Sheldon
as Abigail Snodgrass
Maurice Cass
as E. Prescott Furbush
Alphonse Ethier
as Superintendent
Glenn Strange
as Bouncer
Claudia Smith
as Mary Rogers
Jack Rockwell
as Stage Driver Bill (uncredited)
Buck Bucko
as Barfly
Roy Bucko
Fred Burns
as Trail Patrol Member
Horace B. Carpenter
as Townsman
Jim Corey
as Cowboy
Frank Ellis
Jerry Jerome
as Dude
Tom London
as Jake
Charles Murphy
as Stage Guard #2
Cliff Parkinson
as Stage Guard #1
as Stage Driver Bill
Jim Toney
Bob Woodward
Wen Wright
as Cowhand
Lesley Selander
Director
Earl Sitar
Sound
Robert B. Warwick Jr.
Editor
Harry Sherman
Producer
Lewis J. Rachmil
Art Direction
Russell Harlan
Cinematography
Norman Houston
Screenplay
Clarence E. Mulford
Novel