John Mills

Masterman Finsbury

Ralph Richardson

Joseph Finsbury

Michael Caine

Michael Hubert Gregory Finsbury

Peter Cook

Morris Finsbury

Dudley Moore

John Finsbury

Nanette Newman

Julia Finsbury

Tony Hancock

Detective

Peter Sellers

Doctor Pratt

Cicely Courtneidge

Major Martha

Wilfrid Lawson

Peacock

Thorley Walters

Patience

Gerald Sim

1st Undertaker

Peter Graves

Military Officer

Irene Handl

Mrs. Hackett

Norman Bird

Clergyman

John Le Mesurier

Doctor Slattery

Hilton Edwards

Lawyer

Norman Rossington

1st Rough

Diane Clare

Mercy

Tutte Lemkow

Strangler