Ralph Richardson as Sir Wilfred Robarts

Deborah Kerr as Nurse Plimsoll

Beau Bridges as Leonard Vole

Donald Pleasence as Mr. Myers

Wendy Hiller as Janet Mackenzie

Diana Rigg as Christine Vole

David Langton as Mayhew

Richard Vernon as Brogan-Moore

Peter Sallis as Carter

Michael Gough as Judge

Frank Mills as Chief Inspector Hearne

Michael Nightingale as Clerk of the Court

Peter Copley as Dr. Harrison

Patricia Leslie as Mrs. French

John Kidd as Court Usher

Ken Kitson as Policeman (as Kit Kitson)

Wilfred Grove as Photographer

Primi Townsend as Diana

Andrew MacLachlan as Jury Foreman

Aubrey Woods as Tailor

Zulema Dene as Miss Johnson

Barbara New as Miss O'Brien

Jenny Donnison as 1st Nurse

Ceri Jackson as 2nd Nurse

Harold Coyne as Juror (uncredited)

Walter Henry as Juror (uncredited)

Gerry Judge as Man in Court (uncredited)

Reg Thomason as Barrister (uncredited)

Harry Van Engel as Juror (uncredited)