Wilfrid Lawson
Mr. Goodman
Bernard Lee
Ferry Fane
Alastair Sim
'Soapy' Marx
Arthur Wontner
Colonel Redmayne
Linden Travers
Mary Redmayne
Henry Oscar
Joe Conner
Iris Hoey
Mrs. Elvery
Stanley Lathbury
Hawkins
Lesley Wareing
Veronica Elvery
John Turnbull
Superintendent Hallick
Richard Murdoch
Detective Lewis
Edward Lexy
Inspector Dobie
Richard George
Policeman (uncredited)
Irene Handl
Kitchen Maid
Kathleen Harrison
Parlour Maid
David Keir
Doctor
Jack Lambert
Warder Joyce
Bill Shine
(uncredited)
Jack Vyvyan
Police Constable (uncredited)
Ben Williams
Police Photographer (uncredited)