Con artists use a member of a European royal family to swindle a major jewelry company.
| Actor | Role |
|---|---|
 Jack MulhallGrand Duke Ludwig of Saxe-Thalberg | Grand Duke Ludwig of Saxe-Thalberg |
 Dorothy RevierSarah Minx aka Sally of the Subway | Sarah Minx aka Sally of the Subway |
 Blanche MehaffeyAngela | Angela |
 Huntley GordonStanley M. Gordon | Stanley M. Gordon |
 Harry SemelsLeopold Von Trump | Leopold Von Trump |
 Crauford KentMoffitt | Moffitt |
| JJulia GriffithMiss Duncan - Credit Manager | Miss Duncan - Credit Manager |
 George 'Gabby' HayesPolice Lieutenant Paxton | Police Lieutenant Paxton |
 Bob ReevesBill - Police Officer | Bill - Police Officer |
 Ellinor VanderveerMrs. Stubbs | Mrs. Stubbs |
| JJohn Webb DillionMcMillan, Henchman | McMillan, Henchman |
| WWilliam P. BurtScraggs, Henchman | Scraggs, Henchman |