Mrs Isobel Manners lives a large Victorian house with her two grown up sons; Geoffrey and Edward. Mrs Manners is convinced that someone is trying to murder her.
| Actor | Role |
|---|---|
 Sybil ThorndikeIsabel Manners | Isabel Manners |
 Richard PascoEdward Manners | Edward Manners |
 Denholm ElliottGeoffrey Manners | Geoffrey Manners |
| KKathleen MichaelMadge | Madge |
| AAnne CunninghamArabella | Arabella |
 Thomas HeathcoteMat Johnson | Mat Johnson |
| EEdwin AppsMr. Medina | Mr. Medina |
 Constance ChapmanMrs. Lowell | Mrs. Lowell |
 Campbell SingerSgt. Cosley | Sgt. Cosley |