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)