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