On a cattle drive Hoppy, camp cook Windy, companion Lucky, and young Artie Peters encounter an eccentric professor. The professor professes to be searching for the evolutionary missing link, but in reality he is a cattle rustler who uses his dynamite to scatter the cattle in order capture some of them. Hoppy and Bar 20 guys ultimately capture the professor.
William Boyd
George 'Gabby' Hayes
Russell Hayden
Nora Lane
Harry Worth
Lois Wilde
Billy King
William Duncan
Jack Rutherford
Ernie Adams
John Beach
Ben Corbett
Frank Ellis
Leo J. McMahon
Artie Ortego
Song of Old Wyoming
The Far Country
The Cowboys
Hang 'em High
City Slickers
Red River
The Tall Men
Comes a Horseman
Chisum
Cowboy
Blood on the Moon
Pocket Money
Red River
Thundering Romance
North of 36
Sinister Journey
The Showdown
False Paradise
Unexpected Guest
Wide Open Town
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