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