

Hoppy goes undercover as a gambler from the East when Bar 20 cattle are stolen by unknown rustlers. Brennan/Talbot are twin brothers (one a casino owner, the other a rancher) and Hoppy believes they provide alibis for each other while one is out committing crimes. Hoppy gets a job in the casino to learn more but is exposed when a gambling gunslinger notices him.

William Boyd
Hopalong Cassidy

Russell Hayden
Lucky Jenkins

George 'Gabby' Hayes
Windy Halliday

Ruth Rogers
Barbara Hamilton

Stanley Ridges
Earl Brennan / Dave Talbot
Frederick Burton
Tom Hamilton

Jack Rockwell
City Marshal

Roy Barcroft
Henchman Ewing

Ed Cassidy
Pierce
Wen Wright
Lane

Buzz Barton
Hamilton Ranch Cowhand

Hank Bell
Deputy

Horace B. Carpenter
Card Player
Jess Cavin
Townsman

Jim Corey
Baker

Dick Dickinson
Card Player

Herman Hack
Winning Card Player
Johnny Luther
Barfly
Bud McClure
Deputy
Bruce Mitchell
Bartender at Brennan's Place
Lesley Selander
Maurice Geraghty
Released