Carl Harbord

as Leslie Blake

as Dr. Doremus

as Inspector Sanderson

as Coroner

as Inspector Hopkins

as Marty Williams

as Minor Role (uncredited)

as George Sandleigh

as Lubbock

as Richard 'Dick' Holmes

as Oliver Desmond

as Jacques

as Peter

as David Plummet

as Maurice Avery

as Larry Maitland

as Edgar Gray Doe

as Vivian Fairfax

as Michael Turner

as Arthur Wardell

as Francis McPhillip

as Lieutenant Burnham

as Lt. Gunther