Rinty is a police-dog assigned to a young Scotland Yard police-officer who covers the Limehouse district of London.
| Actor | Role |
|---|---|
 Rin-Tin-TinRinty | Rinty |
 Helene CostelloDale Burke | Dale Burke |
| WWalter MerrillThomas Hallard | Thomas Hallard |
 John PatrickFoster | Foster |
 Otto MatiesonLondon Letter | London Letter |
| GGeorge KotsonarosThe Monk | The Monk |
 DeWitt JenningsInspector Burke | Inspector Burke |
 Carl StockdaleStokes | Stokes |
 Les BatesLong Tom | Long Tom |