Donald Pleasence as Arthur Brownjohn / Sir Easonby 'E' Mellon

Shelley Winters as Hester Green

Terry-Thomas as Clennery Tubbs

Tammy Grimes as Lady Joan Mellon

Judith Arthy as Patricia Parker

Michael Bates as Mr. Harrington

Peter Bayliss as Dr. Hubbles

Joan Benham as Mrs. Payne

Erik Chitty as Uncle Ratty

Margaret Courtenay as Clare Brownjohn

Mark Eden as Jack Parker

Robin Ellis as Ames

Raymond Huntley as George Payne

Patsy Smart as Miss Bonnamie

Oliver Tobias as Peter 'Bobo' Jackson

Keith Marsh as Lillywhite