Générique complet
Scotland Yard
Nancy Kelly
Lady Sandra Lasher
Edmund Gwenn
Insp. Cork
John Loder
Sir John Lasher
Henry Wilcoxon
Dakin Barrolles
Melville Cooper
Dr. Crownfield
Gilbert Emery
Sir Clive Heathcote
Norma Varden
Lady Heathcote
Leyland Hodgson
Henderson
LP
Lionel Pape
Hugh Burnside
Lilian Bond
Lady Constance
Leo G. Carroll
Craven
