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.
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| Directing | Lesley Selander | Director |
| Writing | Norman Houston | Screenplay |
| Camera | Russell Harlan | Director of Photography |
| Art | Lewis J. Rachmil | Art Direction |
| Crew | Ben Corbett | Stunts |
| Production | Harry Sherman | Producer |
| Crew | Ted Wells | Stunts |
| Directing | Theodore Joos | Assistant Director |
| Directing | Derwin Abrahams | Assistant Director |
| Writing | Clarence E. Mulford | Story |
| Sound | Earl Sitar | Sound |
| Production | Ralph Ravenscroft | Production Manager |
| Editing | Robert B. Warwick Jr. | Editor |
| Crew | Leo J. McMahon | Stunts |
