

31/08/1939
El Puma, a Mexican desert guide, escorts an archaeological expedition headed by Professor Lucius Lloyd through the Indian badlands of Mexico. Marian, the professor's niece accompanies the party as only she can translate the Aztec writings in the diary of her father, murdered on a similar expedition six years previous. The professor is murdered by a knife, and the weapon is recognized as the property of El Puma. Magpie, a Federal Investigator, knows that El Puma is really "Lightnin' Bill' Carson, a former federal agent who has been missing since Marian's father was slain. The reluctant Magpie believes that his old pal is guilty. Carson sets out to prove otherwise.

Tim McCoy
as Bill Carson posing as El Puma

Joyce Bryant
as Marian Willis

Ben Corbett
as Magpie

Ted Adams
as Link Benson

Budd Buster
as Old Dobie

Dave O'Brien
as Dr. Jerry Leonard

Forrest Taylor
as Prof. Lucius Lloyd

Reed Howes
as Sheriff

John Elliott
as Prospector

Kenne Duncan
as Henchman

Herman Hack
as Henchman

Chick Hannan
as Henchman

Carl Mathews
as Henchman Hank

Lew Meehan
as El Puma Rider

Kansas Moehring
as El Puma Rider

Artie Ortego
as El Puma Rider Pedro

Tex Palmer
as Henchman

Tom Smith
as El Puma Rider from Argentina (uncredited)

Frank Wayne
as Stagecoach Driver

Wally West
as Wagon Driver

Dan White
as Henchman
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