Shelley Winters
as Mrs. Forrest

Mark Lester
as Christopher Coombs

Chloe Franks
as Katy Coombs

Ralph Richardson
as Mr. Benton

Lionel Jeffries
as Police Insp. Willoughby

Hugh Griffith
as Mr. Harrison, The Pigman

Rosalie Crutchley
as Miss Henley

Pat Heywood
as Dr. Mason

Judy Cornwell
as Clarine

Michael Gothard
as Albie

Jackie Cowper
as Angela Barnes

Richard Beaumont
as Peter Brookshire

Marianne Stone
as Miss Wilcox

Dorian Healy
as Reggie Pike (uncredited)