Cast
Howard Douglas
Weisskopf (uncredited)
Henry Kendall
Rodney Fleming
Betty Ann Davies
Poppy Levine
Peter Haddon
Guy Bannister
Arthur Hambling
Man on BBC Reception Desk (uncredited)
Bruce Lester
Peter Ridgwell (uncredited)
Ian Hunter
Detective Inspector Gregory
Austin Trevor
Leopold Dryden
Lilian Oldland
Joan Dryden
Donald Wolfit
Sydney Parsons
Robert Rendel
Sir Herbert Farquharson
Ivor Barnard
Joseph Higgins (uncredited)
Val Gielgud
Julian Caird
Jack Hawkins
Herbert Evans
Gordon McLeod
Chief Commissioner