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