A famed mystery writer and her doctor ex-lover solve her daughter-in-law's murder.
| Actor | Role |
|---|---|
 Angela LansburyAnn Royce McClain | Ann Royce McClain |
 Laurence OlivierDr. Anthony Wainwright | Dr. Anthony Wainwright |
 Hildegard NeilSheila McClain | Sheila McClain |
 Charles KeatingLawrence McClain | Lawrence McClain |
 Garrick HagonMark Harrison | Mark Harrison |
 Tracey ChildsPamela Harrison | Pamela Harrison |
 Tariq YunusRashi | Rashi |
| HHayward MorseGary | Gary |