Cast
Joyce Bryant
Marian Willis
Ben Corbett
Magpie
Forrest Taylor
Prof. Lucius Lloyd
John Elliott
Prospector
Kenne Duncan
Henchman
Herman Hack
Henchman
Kansas Moehring
El Puma Rider
Budd Buster
Old Dobie
Artie Ortego
El Puma Rider Pedro
Dan White
Henchman
Dave O'Brien
Dr. Jerry Leonard
Carl Mathews
Henchman Hank
Lew Meehan
El Puma Rider
Tim McCoy
Bill Carson posing as El Puma
Ted Adams
Link Benson
Reed Howes
Sheriff