John Cleese
— Sherlock Holmes
William Rushton
— Dr. Watson
Bill Maynard
— Frank Potter
Josephine Tewson
— Lady Cynthia
Norman Bird
— Inspector Street
Larry Martyn
— Fu Manchu
Michael Knowles
— Rupert
Frank Muir
— Self
Dawn Addams
— Self
Ivor Salter
— Airport Loader
Rosemary Lord
— Mabel
Chic Murray
— Constable