As rustled cattle have mysteriously disappeared, Johnny sends for his friend Hoppy, Hoppy arrives and immediately suspects Dan Slack. Realizing his telegram about Slack was intercepted, he locks up the operator Lafe knowing he can escape. Tailing Lafe he finds a secret entrance to a mine and inside finds the missing cattle. But Slack's men also find him just as the cattle are stampeded through the mine shaft.
William Boyd
Andy Clyde
Ellanora Needles
Bobby Larson
Victor Jory
Jay Kirby
Forbes Murray
Christian Rub
George Givot
George Reeves
Hal Taliaferro
Bill Nestell
Bob Kortman
Herman Hack
Victor Adamson
Border Patrol
Doomed Caravan
Forty Thieves
Hidden Gold
Pirates on Horseback
Borrowed Trouble
Dangerous Venture
False Colors
In Old Colorado
Colt Comrades
Hoppy Serves a Writ
Secret of the Wastelands
Heart of Arizona
Hoppy's Holiday
Texas Masquerade
Lost Canyon
Bar 20
The Eagle's Brood
Lumberjack
Bar 20 Justice
