Ruth Roland in her last role alongside Roland Drew in a mystery about murder, blackmail and stolen jewels.
| Actor | Role |
|---|---|
 Ruth RolandCornelia Du Play | Cornelia Du Play |
 Roland DrewInspector Vernon | Inspector Vernon |
| DDoris CovertYvonne Balsac | Yvonne Balsac |
 Kenne DuncanJohn Sommerset | John Sommerset |
| EEugene SigaloffSchubin | Schubin |
 Miriam BattistaToinette - the Maid | Toinette - the Maid |
| AArthur StenningDet. Sgt. Williams | Det. Sgt. Williams |
| AAlex FrazerLouis Mentone - Butler | Louis Mentone - Butler |
| JJulian GrayMr. Balsac - Yvonne's Father | Mr. Balsac - Yvonne's Father |
| GGeorge TempleIvanov | Ivanov |
| FFrederick Dodds SladeNot listed | Not listed |
| JJerry GowanNot listed | Not listed |
| GGerald RowanNot listed | Not listed |
| AAlex MichaelNot listed | Not listed |
| CCecil NicholNot listed | Not listed |
| MM.R. ByattMinor Role (uncredited) | Minor Role (uncredited) |