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)