The Hope Diamond Mystery

Grace Darmond

Mary Hilton / Bibi

Harry Carter

Sidney Atherton / Nang Fu / Ghung

George Chesebro

John Gregge / Jean-Baptiste Tavanier

Boris Karloff

Priest of Kama-Sita / Dakar

Carmen Phillips

Wanda Atherton / Miza

Harry Archer

Johnson

Arthur Clayton

Lord Francis Hale (as Captain C. Clayton)

Ethel Shannon

Lady Francis Hale

William Buckley

Reginald Travers (aka Putnam Bradley Stone)

Frank M. Seki

Saki

William Marion

James Marcon / Bagi

May Yohe

Lady Francis Hope