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.
You can now watch Hopalong Rides Again online on the following streaming providers in the United States.
| Directing | Lesley Selander | Director |
| Writing | Norman Houston | Screenplay |
| Writing | Clarence E. Mulford | Story |
| Production | Harry Sherman | Producer |
| Camera | Russell Harlan | Director of Photography |
| Editing | Robert B. Warwick Jr. | Editor |
| Art | Lewis J. Rachmil | Art Direction |
| Production | Ralph Ravenscroft | Production Manager |
| Directing | Derwin Abrahams | Assistant Director |
| Directing | Theodore Joos | Assistant Director |
| Sound | Earl Sitar | Sound |
| Crew | Ben Corbett | Stunts |
| Crew | Leo J. McMahon | Stunts |
| Crew | Ted Wells | Stunts |
