Hopalong Cassidy, foreman of the Bar-20 Ranch, rides to Judge Marlin's spread in Arizona after the judge asks for help with trouble on his land. Cassidy, Johnny and California find the judge's cattle vanishing along a trail that ends at a waterfall. Cassidy and his companions follow the herd's tracks and find a hidden canyon behind the falls, where the stolen cattle are kept. The series, this broadcast's original air date of August 11, 1941, and its lead actors are not stated in the transcript, so they are omitted here.

With Hopalong Cassidy, Johnny Nelson, California, Buck Peters, Judge Marlin, Myra Marlin, Dan Marlin, Clark Crandall.

Listen for: Cassidy and his companions finding the hidden canyon behind the waterfall, and the tunnel escape

First aired on August 11, 1941.

Episode notes written with AI from the recording itself; the audio is the original broadcast.

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