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