Cecil Parker
Professor Canford
George Cole
'Flash' Harry Cuthbert Edwards
Joyce Grenfell
Sergeant Ruby Gates
Eric Barker
Culpepper-Brown
Irene Handl
Miss Harker-Parker
Dennis Price
Gore Blackwood
Sid James
Alphonse O'Reilly
Julie Alexander
Rosalie Dawn
Lloyd Lamble
Superintendent Samuel Kemp-Bird
Raymond Huntley
Judge Slender
Nicholas Phipps
Major Hargreaves
John Le Mesurier
Minister of Education
George Benson
Defence Counsel
Cyril Chamberlain
Army Captain
Mark Dignam
Prosecuting Counsel
Wensley Pithey
Chief Constable
Liz Fraser
WPC Susan Partridge
Edina Ronay
Lavinia (uncredited)
Erica Rogers
Bobbie (uncredited)
