Ralph Bellamy

as Sir Edward Dominey / Baron Leopold von Ragenstein

Evelyn Ankers

as Lady Muriel Dominey

Aubrey Mather

as Sir Ronald Clayfair

Edward Norris

as Capt. Francois Bardinet

Kaaren Verne

as Baroness Stephanie Idenbraum

Henry Daniell

as Frederick Seamon

Ludwig Stössel

as Dr. Schmidt