Ernest Clark

as Roper

as Col. Balsom

as Harold Grove

as Beauchamp

as Minister

as Sir Basil Smeeton

as Professor Crankshaw

as Stockbroker

as Prison Governor

as Police Doctor

as Captain Ellis - 'Suffolk'

as Under Secretary

as Maine

as Wing Commander Beiseigel

as Outer Party Announcer

as Air Vice-Marshal The Hon. Ralph Cochrane G.B.E., K.C.B., A.F.C.

as Dr. Warren

as Bishop's Secretary

as Hammond