Allan Cuthbertson

as Captain Donaldson

as Mr. Ballard

as Sylvan-Jones

as Det. Inspector

as Vice-Admiral

as Sexton

as Sir Montague Corner

as Member of Whitehall Conference

as Maj. Baker

as Colonel Scuttling - Scotland Yard Man

as Dickie Melborne

as Stanley

as Lord Melford

as Webster

as Col. Hannerly

as Mr McBryde

as Malbete

as Colonel Wright

as Lord Redesdale

as Major Donald Ross

as Major Cranmore