The beautiful but unfaithful wife of a successful lawyer meets her untimely end at their anniversary dinner. After a suicide note is found soon after her death, it seems more likely that she was murdered, as all the dinner guests had good reason to want her dead.
| Actor | Role |
|---|---|
 Anthony AndrewsTony Browne | Tony Browne |
 Deborah RaffinIris Murdoch | Iris Murdoch |
 Pamela BellwoodRuth Lessing | Ruth Lessing |
 Nancy MarchandLucilla Drake | Lucilla Drake |
 Josef SommerGeorge Barton | George Barton |
 David HuffmanStephan Farraday | Stephan Farraday |
 Christine BelfordRosemary Barton | Rosemary Barton |
 June ChadwickSandra Farraday | Sandra Farraday |
 Barrie InghamEric Kidderminster | Eric Kidderminster |
 Harry MorganCaptain Kemp | Captain Kemp |
| AAnne RogersViola Kidderminster | Viola Kidderminster |
| MMichael WoodsVictor Drake | Victor Drake |
 Shera DaneseChristine Shannon | Christine Shannon |
 Ismael 'East' CarloMedical Examiner | Medical Examiner |
| LLinda HoyBoat Manager | Boat Manager |