On screen
Cast
27 credited performers
Ian Hunter
Detective Inspector Gregory
Austin Trevor
Leopold Dryden
Lilian Oldland
Joan Dryden
Henry Kendall
Rodney Fleming
Val Gielgud
Julian Caird
Peter Haddon
Guy Bannister
Betty Ann Davies
Poppy Levine
Jack Hawkins
Herbert Evans
Donald Wolfit
Sydney Parsons
Robert Rendel
Sir Herbert Farquharson
Gordon McLeod
Chief Commissioner
Artwork unavailable
Hannen Swaffer
Hannen Swaffer
Artwork unavailable
Vernon Bartlett
Vernon Bartlett
Artwork unavailable
Eric Dunstan
Eric Dunstan
Artwork unavailable
Gillie Potter
Gillie Potter
Artwork unavailable
Elisabeth Welch
Elisabeth Welch
Artwork unavailable
Eve Becke
Eve Becke
Artwork unavailable
Gershom Parkington
Gershom Parkington
Artwork unavailable
Percival Mackey
Percival Mackey
Ivor Barnard
Joseph Higgins (uncredited)
Artwork unavailable
Cecil Bevan
Police Doctor (uncredited)
Artwork unavailable
George De Warfaz
Foreigner (uncredited)
Howard Douglas
Weisskopf (uncredited)
Arthur Hambling
Man on BBC Reception Desk (uncredited)
Artwork unavailable
Vincent Holman
Detective (uncredited)
Bruce Lester
Peter Ridgwell (uncredited)
Artwork unavailable
Percy Rhodes
Wife's Lover on Broadcast (uncredited)