- Harry Carter
- The Gray Ghost
- Priscilla Dean
- Morn Light
- Emory Johnson
- Wade Hildreth
- Eddie Polo
- Marco
- Gypsy Hart
- Cecilia
- Wilton Taylor
- Ashby
- Gertrude Astor
- Lady Gwendolyn
- Lew Short
- Jerry Tyron
- Dick La Reno
- Mr. Olmstead
- John Cook
- John Reis
- T.D. Crittenden
- Mr. Carlow
- J. Morris Foster
- Fred Olmstead
- Howard Crampton
- Arabin
- Sydney Deane
- Chief of Detective Bureau
- Francis McDonald
- Williams
- Charles Dorian
- Jimmie Pelham of the Star
- Nigel De Brulier
- Jacques
- Frank Tokunaga
- Mora - the Gray Ghost's Valet
- Daniel Leighton
- Undetermined role
