Special Insurance-Investigator Dan Kennedy and his wonder dog, Tarzan the Police Dog, are called in to investigate the persistent robbing of a shipping-and-storage warehouse in Los Angeles.
| Actor | Role |
|---|---|
 Reed HowesDan Kennedy | Dan Kennedy |
 Janet ChandlerSheila Mallory | Sheila Mallory |
 William FarnumMr. Mallory - Sheila's Dad | Mr. Mallory - Sheila's Dad |
 Robert FrazerSteve Graham | Steve Graham |
 Creighton HaleCurley Chandler | Curley Chandler |
 John InceAmos Boswell | Amos Boswell |
| VVance CarrollHenchman Ed | Henchman Ed |
 Charles KingSavonne | Savonne |
 TarzanTarzan (as Tarzan the Police Dog) | Tarzan (as Tarzan the Police Dog) |