Detective Inspector Campbell (Gordon Jackson) looks into the murder of a teacher at a girls school where there are a number of suspects, including her colleagues and the married man she had been seeing.
Barbara Murray
as Miss Shepherd
Gordon Jackson
as Detective Inspector Campbell
Pamela Alan
as Helen Cooper
Jane Aird
as Miss Halstead
Beatrice Varley
as Miss Hopkinson
Anne Butchart
as Miss Oliphant
Imogene Moynihan
as Miss Essex
Jenine Matto
as Miss Stanislaus
Sam Kydd
as Sergeant Harvey (Uncredited)
Robert Long
as Mr. Lawley (uncredited)
Nina Parry
as Mary (uncredited)
Stanley Rose
as Inspector Burgess (uncredited)
