The Hope Diamond Mystery

Grace Darmond

as Mary Hilton / Bibi

Harry Carter

as Sidney Atherton / Nang Fu / Ghung

George Chesebro

as John Gregge / Jean-Baptiste Tavanier

Boris Karloff

as Priest of Kama-Sita / Dakar

Carmen Phillips

as Wanda Atherton / Miza

Harry Archer

as Johnson

Arthur Clayton

as Lord Francis Hale (as Captain C. Clayton)

Ethel Shannon

as Lady Francis Hale

William Buckley

as Reginald Travers (aka Putnam Bradley Stone)

Frank M. Seki

as Saki

William Marion

as James Marcon / Bagi

May Yohe

as Lady Francis Hope