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